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Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
5394af4d | 3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
f0706e82 JB |
4 | * Copyright 2004, Instant802 Networks, Inc. |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
5b323edb | 14 | #include <linux/delay.h> |
f0706e82 JB |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> | |
f0706e82 | 17 | #include <linux/if_arp.h> |
f0706e82 | 18 | #include <linux/etherdevice.h> |
d9b93842 | 19 | #include <linux/moduleparam.h> |
d0709a65 | 20 | #include <linux/rtnetlink.h> |
e8db0be1 | 21 | #include <linux/pm_qos.h> |
d91f36db | 22 | #include <linux/crc32.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
bc3b2d7f | 24 | #include <linux/export.h> |
f0706e82 | 25 | #include <net/mac80211.h> |
472dbc45 | 26 | #include <asm/unaligned.h> |
60f8b39c | 27 | |
f0706e82 | 28 | #include "ieee80211_i.h" |
24487981 | 29 | #include "driver-ops.h" |
2c8dccc7 JB |
30 | #include "rate.h" |
31 | #include "led.h" | |
f0706e82 | 32 | |
1672c0e3 JB |
33 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
34 | #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) | |
35 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
36 | #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) | |
37 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
38 | #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) | |
39 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
66e67e41 | 40 | |
180205bd BG |
41 | static int max_nullfunc_tries = 2; |
42 | module_param(max_nullfunc_tries, int, 0644); | |
43 | MODULE_PARM_DESC(max_nullfunc_tries, | |
44 | "Maximum nullfunc tx tries before disconnecting (reason 4)."); | |
45 | ||
46 | static int max_probe_tries = 5; | |
47 | module_param(max_probe_tries, int, 0644); | |
48 | MODULE_PARM_DESC(max_probe_tries, | |
49 | "Maximum probe tries before disconnecting (reason 4)."); | |
b291ba11 JB |
50 | |
51 | /* | |
7ccc8bd7 FF |
52 | * Beacon loss timeout is calculated as N frames times the |
53 | * advertised beacon interval. This may need to be somewhat | |
54 | * higher than what hardware might detect to account for | |
55 | * delays in the host processing frames. But since we also | |
56 | * probe on beacon miss before declaring the connection lost | |
57 | * default to what we want. | |
b291ba11 | 58 | */ |
7ccc8bd7 FF |
59 | #define IEEE80211_BEACON_LOSS_COUNT 7 |
60 | ||
b291ba11 JB |
61 | /* |
62 | * Time the connection can be idle before we probe | |
63 | * it to see if we can still talk to the AP. | |
64 | */ | |
d1c5091f | 65 | #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) |
b291ba11 JB |
66 | /* |
67 | * Time we wait for a probe response after sending | |
68 | * a probe request because of beacon loss or for | |
69 | * checking the connection still works. | |
70 | */ | |
180205bd BG |
71 | static int probe_wait_ms = 500; |
72 | module_param(probe_wait_ms, int, 0644); | |
73 | MODULE_PARM_DESC(probe_wait_ms, | |
74 | "Maximum time(ms) to wait for probe response" | |
75 | " before disconnecting (reason 4)."); | |
f0706e82 | 76 | |
17e4ec14 JM |
77 | /* |
78 | * Weight given to the latest Beacon frame when calculating average signal | |
79 | * strength for Beacon frames received in the current BSS. This must be | |
80 | * between 1 and 15. | |
81 | */ | |
82 | #define IEEE80211_SIGNAL_AVE_WEIGHT 3 | |
83 | ||
391a200a JM |
84 | /* |
85 | * How many Beacon frames need to have been used in average signal strength | |
86 | * before starting to indicate signal change events. | |
87 | */ | |
88 | #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 | |
89 | ||
5bb644a0 JB |
90 | #define TMR_RUNNING_TIMER 0 |
91 | #define TMR_RUNNING_CHANSW 1 | |
92 | ||
77fdaa12 JB |
93 | /* |
94 | * All cfg80211 functions have to be called outside a locked | |
95 | * section so that they can acquire a lock themselves... This | |
96 | * is much simpler than queuing up things in cfg80211, but we | |
97 | * do need some indirection for that here. | |
98 | */ | |
99 | enum rx_mgmt_action { | |
100 | /* no action required */ | |
101 | RX_MGMT_NONE, | |
102 | ||
77fdaa12 JB |
103 | /* caller must call cfg80211_send_deauth() */ |
104 | RX_MGMT_CFG80211_DEAUTH, | |
105 | ||
106 | /* caller must call cfg80211_send_disassoc() */ | |
107 | RX_MGMT_CFG80211_DISASSOC, | |
66e67e41 JB |
108 | |
109 | /* caller must call cfg80211_send_rx_auth() */ | |
110 | RX_MGMT_CFG80211_RX_AUTH, | |
111 | ||
112 | /* caller must call cfg80211_send_rx_assoc() */ | |
113 | RX_MGMT_CFG80211_RX_ASSOC, | |
114 | ||
115 | /* caller must call cfg80211_send_assoc_timeout() */ | |
116 | RX_MGMT_CFG80211_ASSOC_TIMEOUT, | |
77fdaa12 JB |
117 | }; |
118 | ||
5484e237 | 119 | /* utils */ |
77fdaa12 JB |
120 | static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd) |
121 | { | |
46a5ebaf | 122 | lockdep_assert_held(&ifmgd->mtx); |
77fdaa12 JB |
123 | } |
124 | ||
ca386f31 JB |
125 | /* |
126 | * We can have multiple work items (and connection probing) | |
127 | * scheduling this timer, but we need to take care to only | |
128 | * reschedule it when it should fire _earlier_ than it was | |
129 | * asked for before, or if it's not pending right now. This | |
130 | * function ensures that. Note that it then is required to | |
131 | * run this function for all timeouts after the first one | |
132 | * has happened -- the work that runs from this timer will | |
133 | * do that. | |
134 | */ | |
66e67e41 | 135 | static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout) |
ca386f31 JB |
136 | { |
137 | ASSERT_MGD_MTX(ifmgd); | |
138 | ||
139 | if (!timer_pending(&ifmgd->timer) || | |
140 | time_before(timeout, ifmgd->timer.expires)) | |
141 | mod_timer(&ifmgd->timer, timeout); | |
142 | } | |
143 | ||
d3a910a8 | 144 | void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) |
b291ba11 | 145 | { |
c1288b12 | 146 | if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) |
b291ba11 JB |
147 | return; |
148 | ||
7eeff74c JB |
149 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
150 | return; | |
151 | ||
b291ba11 | 152 | mod_timer(&sdata->u.mgd.bcn_mon_timer, |
7ccc8bd7 | 153 | round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); |
b291ba11 JB |
154 | } |
155 | ||
be099e82 LR |
156 | void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) |
157 | { | |
0c699c3a LR |
158 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
159 | ||
8628172f SG |
160 | if (unlikely(!sdata->u.mgd.associated)) |
161 | return; | |
162 | ||
be099e82 LR |
163 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
164 | return; | |
165 | ||
166 | mod_timer(&sdata->u.mgd.conn_mon_timer, | |
167 | round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); | |
0c699c3a LR |
168 | |
169 | ifmgd->probe_send_count = 0; | |
be099e82 LR |
170 | } |
171 | ||
5484e237 | 172 | static int ecw2cw(int ecw) |
60f8b39c | 173 | { |
5484e237 | 174 | return (1 << ecw) - 1; |
60f8b39c JB |
175 | } |
176 | ||
24398e39 JB |
177 | static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata, |
178 | struct ieee80211_ht_operation *ht_oper, | |
179 | const u8 *bssid, bool reconfig) | |
d5522e03 JB |
180 | { |
181 | struct ieee80211_local *local = sdata->local; | |
182 | struct ieee80211_supported_band *sband; | |
55de908a JB |
183 | struct ieee80211_chanctx_conf *chanctx_conf; |
184 | struct ieee80211_channel *chan; | |
d5522e03 JB |
185 | struct sta_info *sta; |
186 | u32 changed = 0; | |
9ed6bcce | 187 | u16 ht_opmode; |
64f68e5d | 188 | bool disable_40 = false; |
d5522e03 | 189 | |
55de908a JB |
190 | rcu_read_lock(); |
191 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
192 | if (WARN_ON(!chanctx_conf)) { | |
193 | rcu_read_unlock(); | |
194 | return 0; | |
195 | } | |
4bf88530 | 196 | chan = chanctx_conf->def.chan; |
55de908a JB |
197 | rcu_read_unlock(); |
198 | sband = local->hw.wiphy->bands[chan->band]; | |
d5522e03 | 199 | |
4bf88530 JB |
200 | switch (sdata->vif.bss_conf.chandef.width) { |
201 | case NL80211_CHAN_WIDTH_40: | |
202 | if (sdata->vif.bss_conf.chandef.chan->center_freq > | |
203 | sdata->vif.bss_conf.chandef.center_freq1 && | |
75e6934a | 204 | chan->flags & IEEE80211_CHAN_NO_HT40MINUS) |
64f68e5d | 205 | disable_40 = true; |
4bf88530 JB |
206 | if (sdata->vif.bss_conf.chandef.chan->center_freq < |
207 | sdata->vif.bss_conf.chandef.center_freq1 && | |
75e6934a | 208 | chan->flags & IEEE80211_CHAN_NO_HT40PLUS) |
64f68e5d JB |
209 | disable_40 = true; |
210 | break; | |
211 | default: | |
212 | break; | |
213 | } | |
d5522e03 | 214 | |
24398e39 JB |
215 | /* This can change during the lifetime of the BSS */ |
216 | if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) | |
64f68e5d JB |
217 | disable_40 = true; |
218 | ||
219 | mutex_lock(&local->sta_mtx); | |
220 | sta = sta_info_get(sdata, bssid); | |
d5522e03 | 221 | |
64f68e5d JB |
222 | WARN_ON_ONCE(!sta); |
223 | ||
224 | if (sta && !sta->supports_40mhz) | |
225 | disable_40 = true; | |
226 | ||
227 | if (sta && (!reconfig || | |
91a0099c | 228 | (disable_40 != !(sta->sta.ht_cap.cap & |
64f68e5d | 229 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) { |
d5522e03 | 230 | |
64f68e5d JB |
231 | if (disable_40) |
232 | sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
233 | else | |
234 | sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
7cc44ed4 | 235 | |
64f68e5d | 236 | rate_control_rate_update(local, sband, sta, |
8f727ef3 | 237 | IEEE80211_RC_BW_CHANGED); |
0aaffa9b | 238 | } |
64f68e5d | 239 | mutex_unlock(&local->sta_mtx); |
d5522e03 | 240 | |
074d46d1 | 241 | ht_opmode = le16_to_cpu(ht_oper->operation_mode); |
d5522e03 JB |
242 | |
243 | /* if bss configuration changed store the new one */ | |
24398e39 | 244 | if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) { |
d5522e03 | 245 | changed |= BSS_CHANGED_HT; |
9ed6bcce | 246 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
d5522e03 JB |
247 | } |
248 | ||
249 | return changed; | |
250 | } | |
251 | ||
9c6bd790 JB |
252 | /* frame sending functions */ |
253 | ||
66e67e41 JB |
254 | static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len, |
255 | struct ieee80211_supported_band *sband, | |
256 | u32 *rates) | |
257 | { | |
258 | int i, j, count; | |
259 | *rates = 0; | |
260 | count = 0; | |
261 | for (i = 0; i < supp_rates_len; i++) { | |
262 | int rate = (supp_rates[i] & 0x7F) * 5; | |
263 | ||
264 | for (j = 0; j < sband->n_bitrates; j++) | |
265 | if (sband->bitrates[j].bitrate == rate) { | |
266 | *rates |= BIT(j); | |
267 | count++; | |
268 | break; | |
269 | } | |
270 | } | |
271 | ||
272 | return count; | |
273 | } | |
274 | ||
275 | static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, | |
9dde6423 | 276 | struct sk_buff *skb, u8 ap_ht_param, |
66e67e41 JB |
277 | struct ieee80211_supported_band *sband, |
278 | struct ieee80211_channel *channel, | |
279 | enum ieee80211_smps_mode smps) | |
280 | { | |
66e67e41 JB |
281 | u8 *pos; |
282 | u32 flags = channel->flags; | |
283 | u16 cap; | |
284 | struct ieee80211_sta_ht_cap ht_cap; | |
285 | ||
286 | BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); | |
287 | ||
66e67e41 JB |
288 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); |
289 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); | |
290 | ||
66e67e41 JB |
291 | /* determine capability flags */ |
292 | cap = ht_cap.cap; | |
293 | ||
9dde6423 | 294 | switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
66e67e41 JB |
295 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
296 | if (flags & IEEE80211_CHAN_NO_HT40PLUS) { | |
297 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
298 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
299 | } | |
300 | break; | |
301 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
302 | if (flags & IEEE80211_CHAN_NO_HT40MINUS) { | |
303 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
304 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
305 | } | |
306 | break; | |
307 | } | |
308 | ||
24398e39 JB |
309 | /* |
310 | * If 40 MHz was disabled associate as though we weren't | |
311 | * capable of 40 MHz -- some broken APs will never fall | |
312 | * back to trying to transmit in 20 MHz. | |
313 | */ | |
314 | if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { | |
315 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
316 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
317 | } | |
318 | ||
66e67e41 JB |
319 | /* set SM PS mode properly */ |
320 | cap &= ~IEEE80211_HT_CAP_SM_PS; | |
321 | switch (smps) { | |
322 | case IEEE80211_SMPS_AUTOMATIC: | |
323 | case IEEE80211_SMPS_NUM_MODES: | |
324 | WARN_ON(1); | |
325 | case IEEE80211_SMPS_OFF: | |
326 | cap |= WLAN_HT_CAP_SM_PS_DISABLED << | |
327 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
328 | break; | |
329 | case IEEE80211_SMPS_STATIC: | |
330 | cap |= WLAN_HT_CAP_SM_PS_STATIC << | |
331 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
332 | break; | |
333 | case IEEE80211_SMPS_DYNAMIC: | |
334 | cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << | |
335 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
336 | break; | |
337 | } | |
338 | ||
339 | /* reserve and fill IE */ | |
340 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
341 | ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); | |
342 | } | |
343 | ||
d545daba MP |
344 | static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, |
345 | struct sk_buff *skb, | |
b08fbbd8 JB |
346 | struct ieee80211_supported_band *sband, |
347 | struct ieee80211_vht_cap *ap_vht_cap) | |
d545daba MP |
348 | { |
349 | u8 *pos; | |
350 | u32 cap; | |
351 | struct ieee80211_sta_vht_cap vht_cap; | |
b08fbbd8 | 352 | int i; |
d545daba MP |
353 | |
354 | BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); | |
355 | ||
356 | memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); | |
357 | ||
358 | /* determine capability flags */ | |
359 | cap = vht_cap.cap; | |
360 | ||
f2d9d270 JB |
361 | if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { |
362 | cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ; | |
363 | cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; | |
364 | } | |
365 | ||
366 | if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { | |
367 | cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; | |
368 | cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; | |
369 | } | |
370 | ||
b08fbbd8 JB |
371 | /* |
372 | * Some APs apparently get confused if our capabilities are better | |
373 | * than theirs, so restrict what we advertise in the assoc request. | |
374 | */ | |
375 | if (!(ap_vht_cap->vht_cap_info & | |
376 | cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) | |
377 | cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE; | |
378 | ||
379 | if (!(ap_vht_cap->vht_cap_info & | |
380 | cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC))) | |
381 | cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 | | |
382 | IEEE80211_VHT_CAP_RXSTBC_3 | | |
383 | IEEE80211_VHT_CAP_RXSTBC_4); | |
384 | ||
385 | for (i = 0; i < 8; i++) { | |
386 | int shift = i * 2; | |
387 | u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift; | |
388 | u16 ap_mcs, our_mcs; | |
389 | ||
390 | ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) & | |
391 | mask) >> shift; | |
392 | our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) & | |
393 | mask) >> shift; | |
394 | ||
395 | switch (ap_mcs) { | |
396 | default: | |
397 | if (our_mcs <= ap_mcs) | |
398 | break; | |
399 | /* fall through */ | |
400 | case IEEE80211_VHT_MCS_NOT_SUPPORTED: | |
401 | vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask); | |
402 | vht_cap.vht_mcs.rx_mcs_map |= | |
403 | cpu_to_le16(ap_mcs << shift); | |
404 | } | |
405 | } | |
406 | ||
d545daba | 407 | /* reserve and fill IE */ |
d4950281 | 408 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); |
d545daba MP |
409 | ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); |
410 | } | |
411 | ||
66e67e41 JB |
412 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) |
413 | { | |
414 | struct ieee80211_local *local = sdata->local; | |
415 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
416 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; | |
417 | struct sk_buff *skb; | |
418 | struct ieee80211_mgmt *mgmt; | |
419 | u8 *pos, qos_info; | |
420 | size_t offset = 0, noffset; | |
421 | int i, count, rates_len, supp_rates_len; | |
422 | u16 capab; | |
423 | struct ieee80211_supported_band *sband; | |
55de908a JB |
424 | struct ieee80211_chanctx_conf *chanctx_conf; |
425 | struct ieee80211_channel *chan; | |
66e67e41 | 426 | u32 rates = 0; |
66e67e41 JB |
427 | |
428 | lockdep_assert_held(&ifmgd->mtx); | |
429 | ||
55de908a JB |
430 | rcu_read_lock(); |
431 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
432 | if (WARN_ON(!chanctx_conf)) { | |
433 | rcu_read_unlock(); | |
434 | return; | |
435 | } | |
4bf88530 | 436 | chan = chanctx_conf->def.chan; |
55de908a JB |
437 | rcu_read_unlock(); |
438 | sband = local->hw.wiphy->bands[chan->band]; | |
66e67e41 JB |
439 | |
440 | if (assoc_data->supp_rates_len) { | |
441 | /* | |
442 | * Get all rates supported by the device and the AP as | |
443 | * some APs don't like getting a superset of their rates | |
444 | * in the association request (e.g. D-Link DAP 1353 in | |
445 | * b-only mode)... | |
446 | */ | |
447 | rates_len = ieee80211_compatible_rates(assoc_data->supp_rates, | |
448 | assoc_data->supp_rates_len, | |
449 | sband, &rates); | |
450 | } else { | |
451 | /* | |
452 | * In case AP not provide any supported rates information | |
453 | * before association, we send information element(s) with | |
454 | * all rates that we support. | |
455 | */ | |
456 | rates = ~0; | |
457 | rates_len = sband->n_bitrates; | |
458 | } | |
459 | ||
460 | skb = alloc_skb(local->hw.extra_tx_headroom + | |
461 | sizeof(*mgmt) + /* bit too much but doesn't matter */ | |
462 | 2 + assoc_data->ssid_len + /* SSID */ | |
463 | 4 + rates_len + /* (extended) rates */ | |
464 | 4 + /* power capability */ | |
465 | 2 + 2 * sband->n_channels + /* supported channels */ | |
466 | 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ | |
d4950281 | 467 | 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ |
66e67e41 JB |
468 | assoc_data->ie_len + /* extra IEs */ |
469 | 9, /* WMM */ | |
470 | GFP_KERNEL); | |
471 | if (!skb) | |
472 | return; | |
473 | ||
474 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
475 | ||
476 | capab = WLAN_CAPABILITY_ESS; | |
477 | ||
478 | if (sband->band == IEEE80211_BAND_2GHZ) { | |
479 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
480 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
481 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
482 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
483 | } | |
484 | ||
485 | if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) | |
486 | capab |= WLAN_CAPABILITY_PRIVACY; | |
487 | ||
488 | if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && | |
489 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
490 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
491 | ||
492 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
493 | memset(mgmt, 0, 24); | |
494 | memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); | |
495 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
496 | memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); | |
497 | ||
498 | if (!is_zero_ether_addr(assoc_data->prev_bssid)) { | |
499 | skb_put(skb, 10); | |
500 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
501 | IEEE80211_STYPE_REASSOC_REQ); | |
502 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
503 | mgmt->u.reassoc_req.listen_interval = | |
504 | cpu_to_le16(local->hw.conf.listen_interval); | |
505 | memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, | |
506 | ETH_ALEN); | |
507 | } else { | |
508 | skb_put(skb, 4); | |
509 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
510 | IEEE80211_STYPE_ASSOC_REQ); | |
511 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
512 | mgmt->u.assoc_req.listen_interval = | |
513 | cpu_to_le16(local->hw.conf.listen_interval); | |
514 | } | |
515 | ||
516 | /* SSID */ | |
517 | pos = skb_put(skb, 2 + assoc_data->ssid_len); | |
518 | *pos++ = WLAN_EID_SSID; | |
519 | *pos++ = assoc_data->ssid_len; | |
520 | memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); | |
521 | ||
522 | /* add all rates which were marked to be used above */ | |
523 | supp_rates_len = rates_len; | |
524 | if (supp_rates_len > 8) | |
525 | supp_rates_len = 8; | |
526 | ||
527 | pos = skb_put(skb, supp_rates_len + 2); | |
528 | *pos++ = WLAN_EID_SUPP_RATES; | |
529 | *pos++ = supp_rates_len; | |
530 | ||
531 | count = 0; | |
532 | for (i = 0; i < sband->n_bitrates; i++) { | |
533 | if (BIT(i) & rates) { | |
534 | int rate = sband->bitrates[i].bitrate; | |
535 | *pos++ = (u8) (rate / 5); | |
536 | if (++count == 8) | |
537 | break; | |
538 | } | |
539 | } | |
540 | ||
541 | if (rates_len > count) { | |
542 | pos = skb_put(skb, rates_len - count + 2); | |
543 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
544 | *pos++ = rates_len - count; | |
545 | ||
546 | for (i++; i < sband->n_bitrates; i++) { | |
547 | if (BIT(i) & rates) { | |
548 | int rate = sband->bitrates[i].bitrate; | |
549 | *pos++ = (u8) (rate / 5); | |
550 | } | |
551 | } | |
552 | } | |
553 | ||
554 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
555 | /* 1. power capabilities */ | |
556 | pos = skb_put(skb, 4); | |
557 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
558 | *pos++ = 2; | |
559 | *pos++ = 0; /* min tx power */ | |
55de908a | 560 | *pos++ = chan->max_power; /* max tx power */ |
66e67e41 JB |
561 | |
562 | /* 2. supported channels */ | |
563 | /* TODO: get this in reg domain format */ | |
564 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
565 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
566 | *pos++ = 2 * sband->n_channels; | |
567 | for (i = 0; i < sband->n_channels; i++) { | |
568 | *pos++ = ieee80211_frequency_to_channel( | |
569 | sband->channels[i].center_freq); | |
570 | *pos++ = 1; /* one channel in the subband*/ | |
571 | } | |
572 | } | |
573 | ||
574 | /* if present, add any custom IEs that go before HT */ | |
575 | if (assoc_data->ie_len && assoc_data->ie) { | |
576 | static const u8 before_ht[] = { | |
577 | WLAN_EID_SSID, | |
578 | WLAN_EID_SUPP_RATES, | |
579 | WLAN_EID_EXT_SUPP_RATES, | |
580 | WLAN_EID_PWR_CAPABILITY, | |
581 | WLAN_EID_SUPPORTED_CHANNELS, | |
582 | WLAN_EID_RSN, | |
583 | WLAN_EID_QOS_CAPA, | |
584 | WLAN_EID_RRM_ENABLED_CAPABILITIES, | |
585 | WLAN_EID_MOBILITY_DOMAIN, | |
586 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
587 | }; | |
588 | noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, | |
589 | before_ht, ARRAY_SIZE(before_ht), | |
590 | offset); | |
591 | pos = skb_put(skb, noffset - offset); | |
592 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
593 | offset = noffset; | |
594 | } | |
595 | ||
f2d9d270 JB |
596 | if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && |
597 | !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) | |
598 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; | |
599 | ||
a8243b72 | 600 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
9dde6423 | 601 | ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, |
04ecd257 | 602 | sband, chan, sdata->smps_mode); |
66e67e41 | 603 | |
d545daba | 604 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
b08fbbd8 JB |
605 | ieee80211_add_vht_ie(sdata, skb, sband, |
606 | &assoc_data->ap_vht_cap); | |
d545daba | 607 | |
66e67e41 JB |
608 | /* if present, add any custom non-vendor IEs that go after HT */ |
609 | if (assoc_data->ie_len && assoc_data->ie) { | |
610 | noffset = ieee80211_ie_split_vendor(assoc_data->ie, | |
611 | assoc_data->ie_len, | |
612 | offset); | |
613 | pos = skb_put(skb, noffset - offset); | |
614 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
615 | offset = noffset; | |
616 | } | |
617 | ||
76f0303d JB |
618 | if (assoc_data->wmm) { |
619 | if (assoc_data->uapsd) { | |
dc41e4d4 EP |
620 | qos_info = ifmgd->uapsd_queues; |
621 | qos_info |= (ifmgd->uapsd_max_sp_len << | |
66e67e41 JB |
622 | IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); |
623 | } else { | |
624 | qos_info = 0; | |
625 | } | |
626 | ||
627 | pos = skb_put(skb, 9); | |
628 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
629 | *pos++ = 7; /* len */ | |
630 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
631 | *pos++ = 0x50; | |
632 | *pos++ = 0xf2; | |
633 | *pos++ = 2; /* WME */ | |
634 | *pos++ = 0; /* WME info */ | |
635 | *pos++ = 1; /* WME ver */ | |
636 | *pos++ = qos_info; | |
637 | } | |
638 | ||
639 | /* add any remaining custom (i.e. vendor specific here) IEs */ | |
640 | if (assoc_data->ie_len && assoc_data->ie) { | |
641 | noffset = assoc_data->ie_len; | |
642 | pos = skb_put(skb, noffset - offset); | |
643 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
644 | } | |
645 | ||
a1845fc7 JB |
646 | drv_mgd_prepare_tx(local, sdata); |
647 | ||
66e67e41 | 648 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
1672c0e3 JB |
649 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
650 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | | |
651 | IEEE80211_TX_INTFL_MLME_CONN_TX; | |
66e67e41 JB |
652 | ieee80211_tx_skb(sdata, skb); |
653 | } | |
654 | ||
572e0012 KV |
655 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
656 | struct ieee80211_sub_if_data *sdata) | |
657 | { | |
572e0012 KV |
658 | struct ieee80211_pspoll *pspoll; |
659 | struct sk_buff *skb; | |
572e0012 | 660 | |
d8cd189e KV |
661 | skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); |
662 | if (!skb) | |
572e0012 | 663 | return; |
572e0012 | 664 | |
d8cd189e KV |
665 | pspoll = (struct ieee80211_pspoll *) skb->data; |
666 | pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); | |
572e0012 | 667 | |
62ae67be JB |
668 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
669 | ieee80211_tx_skb(sdata, skb); | |
572e0012 KV |
670 | } |
671 | ||
965bedad JB |
672 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
673 | struct ieee80211_sub_if_data *sdata, | |
674 | int powersave) | |
675 | { | |
676 | struct sk_buff *skb; | |
d8cd189e | 677 | struct ieee80211_hdr_3addr *nullfunc; |
b6f35301 | 678 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
965bedad | 679 | |
d8cd189e KV |
680 | skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); |
681 | if (!skb) | |
965bedad | 682 | return; |
965bedad | 683 | |
d8cd189e | 684 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; |
965bedad | 685 | if (powersave) |
d8cd189e | 686 | nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
965bedad | 687 | |
6c17b77b SF |
688 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | |
689 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK; | |
b6f35301 RM |
690 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
691 | IEEE80211_STA_CONNECTION_POLL)) | |
692 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; | |
693 | ||
62ae67be | 694 | ieee80211_tx_skb(sdata, skb); |
965bedad JB |
695 | } |
696 | ||
d524215f FF |
697 | static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, |
698 | struct ieee80211_sub_if_data *sdata) | |
699 | { | |
700 | struct sk_buff *skb; | |
701 | struct ieee80211_hdr *nullfunc; | |
702 | __le16 fc; | |
703 | ||
704 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
705 | return; | |
706 | ||
707 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); | |
d15b8459 | 708 | if (!skb) |
d524215f | 709 | return; |
d15b8459 | 710 | |
d524215f FF |
711 | skb_reserve(skb, local->hw.extra_tx_headroom); |
712 | ||
713 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); | |
714 | memset(nullfunc, 0, 30); | |
715 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
716 | IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
717 | nullfunc->frame_control = fc; | |
718 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
719 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
720 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
721 | memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); | |
722 | ||
723 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
724 | ieee80211_tx_skb(sdata, skb); | |
725 | } | |
726 | ||
cc32abd4 JB |
727 | /* spectrum management related things */ |
728 | static void ieee80211_chswitch_work(struct work_struct *work) | |
729 | { | |
730 | struct ieee80211_sub_if_data *sdata = | |
731 | container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); | |
cc32abd4 JB |
732 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
733 | ||
9607e6b6 | 734 | if (!ieee80211_sdata_running(sdata)) |
cc32abd4 JB |
735 | return; |
736 | ||
77fdaa12 JB |
737 | mutex_lock(&ifmgd->mtx); |
738 | if (!ifmgd->associated) | |
739 | goto out; | |
cc32abd4 | 740 | |
55de908a | 741 | sdata->local->_oper_channel = sdata->local->csa_channel; |
5ce6e438 JB |
742 | if (!sdata->local->ops->channel_switch) { |
743 | /* call "hw_config" only if doing sw channel switch */ | |
744 | ieee80211_hw_config(sdata->local, | |
745 | IEEE80211_CONF_CHANGE_CHANNEL); | |
1ea57b1f SL |
746 | } else { |
747 | /* update the device channel directly */ | |
55de908a | 748 | sdata->local->hw.conf.channel = sdata->local->_oper_channel; |
5ce6e438 | 749 | } |
77fdaa12 | 750 | |
cc32abd4 | 751 | /* XXX: shouldn't really modify cfg80211-owned data! */ |
55de908a | 752 | ifmgd->associated->channel = sdata->local->_oper_channel; |
cc32abd4 | 753 | |
57eebdf3 | 754 | /* XXX: wait for a beacon first? */ |
cc32abd4 JB |
755 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
756 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
77fdaa12 JB |
757 | out: |
758 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; | |
759 | mutex_unlock(&ifmgd->mtx); | |
cc32abd4 JB |
760 | } |
761 | ||
5ce6e438 JB |
762 | void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) |
763 | { | |
55de908a JB |
764 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
765 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
5ce6e438 JB |
766 | |
767 | trace_api_chswitch_done(sdata, success); | |
768 | if (!success) { | |
882a7c69 JB |
769 | sdata_info(sdata, |
770 | "driver channel switch failed, disconnecting\n"); | |
771 | ieee80211_queue_work(&sdata->local->hw, | |
772 | &ifmgd->csa_connection_drop_work); | |
773 | } else { | |
774 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); | |
5ce6e438 | 775 | } |
5ce6e438 JB |
776 | } |
777 | EXPORT_SYMBOL(ieee80211_chswitch_done); | |
778 | ||
cc32abd4 JB |
779 | static void ieee80211_chswitch_timer(unsigned long data) |
780 | { | |
781 | struct ieee80211_sub_if_data *sdata = | |
782 | (struct ieee80211_sub_if_data *) data; | |
783 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
784 | ||
5bb644a0 JB |
785 | if (sdata->local->quiescing) { |
786 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
787 | return; | |
788 | } | |
789 | ||
42935eca | 790 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 JB |
791 | } |
792 | ||
793 | void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
794 | struct ieee80211_channel_sw_ie *sw_elem, | |
5ce6e438 JB |
795 | struct ieee80211_bss *bss, |
796 | u64 timestamp) | |
cc32abd4 | 797 | { |
0c1ad2ca JB |
798 | struct cfg80211_bss *cbss = |
799 | container_of((void *)bss, struct cfg80211_bss, priv); | |
cc32abd4 JB |
800 | struct ieee80211_channel *new_ch; |
801 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
59eb21a6 BR |
802 | int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num, |
803 | cbss->channel->band); | |
55de908a | 804 | struct ieee80211_chanctx *chanctx; |
cc32abd4 | 805 | |
77fdaa12 JB |
806 | ASSERT_MGD_MTX(ifmgd); |
807 | ||
808 | if (!ifmgd->associated) | |
cc32abd4 JB |
809 | return; |
810 | ||
fbe9c429 | 811 | if (sdata->local->scanning) |
cc32abd4 JB |
812 | return; |
813 | ||
814 | /* Disregard subsequent beacons if we are already running a timer | |
815 | processing a CSA */ | |
816 | ||
817 | if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) | |
818 | return; | |
819 | ||
820 | new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); | |
882a7c69 JB |
821 | if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) { |
822 | sdata_info(sdata, | |
823 | "AP %pM switches to unsupported channel (%d MHz), disconnecting\n", | |
824 | ifmgd->associated->bssid, new_freq); | |
825 | ieee80211_queue_work(&sdata->local->hw, | |
826 | &ifmgd->csa_connection_drop_work); | |
cc32abd4 | 827 | return; |
882a7c69 | 828 | } |
cc32abd4 | 829 | |
57eebdf3 JB |
830 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; |
831 | ||
55de908a JB |
832 | if (sdata->local->use_chanctx) { |
833 | sdata_info(sdata, | |
834 | "not handling channel switch with channel contexts\n"); | |
835 | ieee80211_queue_work(&sdata->local->hw, | |
836 | &ifmgd->csa_connection_drop_work); | |
246dc3fd | 837 | return; |
55de908a JB |
838 | } |
839 | ||
840 | mutex_lock(&sdata->local->chanctx_mtx); | |
841 | if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) { | |
842 | mutex_unlock(&sdata->local->chanctx_mtx); | |
843 | return; | |
844 | } | |
845 | chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf), | |
846 | struct ieee80211_chanctx, conf); | |
847 | if (chanctx->refcount > 1) { | |
848 | sdata_info(sdata, | |
849 | "channel switch with multiple interfaces on the same channel, disconnecting\n"); | |
850 | ieee80211_queue_work(&sdata->local->hw, | |
851 | &ifmgd->csa_connection_drop_work); | |
852 | mutex_unlock(&sdata->local->chanctx_mtx); | |
853 | return; | |
854 | } | |
855 | mutex_unlock(&sdata->local->chanctx_mtx); | |
856 | ||
857 | sdata->local->csa_channel = new_ch; | |
858 | ||
57eebdf3 JB |
859 | if (sw_elem->mode) |
860 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
861 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
862 | ||
5ce6e438 JB |
863 | if (sdata->local->ops->channel_switch) { |
864 | /* use driver's channel switch callback */ | |
57eebdf3 JB |
865 | struct ieee80211_channel_switch ch_switch = { |
866 | .timestamp = timestamp, | |
867 | .block_tx = sw_elem->mode, | |
868 | .channel = new_ch, | |
869 | .count = sw_elem->count, | |
870 | }; | |
871 | ||
5ce6e438 JB |
872 | drv_channel_switch(sdata->local, &ch_switch); |
873 | return; | |
874 | } | |
875 | ||
876 | /* channel switch handled in software */ | |
57eebdf3 | 877 | if (sw_elem->count <= 1) |
42935eca | 878 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
57eebdf3 | 879 | else |
cc32abd4 | 880 | mod_timer(&ifmgd->chswitch_timer, |
3049000b JB |
881 | TU_TO_EXP_TIME(sw_elem->count * |
882 | cbss->beacon_interval)); | |
cc32abd4 JB |
883 | } |
884 | ||
1ea6f9c0 JB |
885 | static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, |
886 | struct ieee80211_channel *channel, | |
887 | const u8 *country_ie, u8 country_ie_len, | |
888 | const u8 *pwr_constr_elem) | |
cc32abd4 | 889 | { |
04b7b2ff JB |
890 | struct ieee80211_country_ie_triplet *triplet; |
891 | int chan = ieee80211_frequency_to_channel(channel->center_freq); | |
892 | int i, chan_pwr, chan_increment, new_ap_level; | |
893 | bool have_chan_pwr = false; | |
cc32abd4 | 894 | |
04b7b2ff JB |
895 | /* Invalid IE */ |
896 | if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1ea6f9c0 | 897 | return 0; |
cc32abd4 | 898 | |
04b7b2ff JB |
899 | triplet = (void *)(country_ie + 3); |
900 | country_ie_len -= 3; | |
901 | ||
902 | switch (channel->band) { | |
903 | default: | |
904 | WARN_ON_ONCE(1); | |
905 | /* fall through */ | |
906 | case IEEE80211_BAND_2GHZ: | |
907 | case IEEE80211_BAND_60GHZ: | |
908 | chan_increment = 1; | |
909 | break; | |
910 | case IEEE80211_BAND_5GHZ: | |
911 | chan_increment = 4; | |
912 | break; | |
cc32abd4 | 913 | } |
04b7b2ff JB |
914 | |
915 | /* find channel */ | |
916 | while (country_ie_len >= 3) { | |
917 | u8 first_channel = triplet->chans.first_channel; | |
918 | ||
919 | if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) | |
920 | goto next; | |
921 | ||
922 | for (i = 0; i < triplet->chans.num_channels; i++) { | |
923 | if (first_channel + i * chan_increment == chan) { | |
924 | have_chan_pwr = true; | |
925 | chan_pwr = triplet->chans.max_power; | |
926 | break; | |
927 | } | |
928 | } | |
929 | if (have_chan_pwr) | |
930 | break; | |
931 | ||
932 | next: | |
933 | triplet++; | |
934 | country_ie_len -= 3; | |
935 | } | |
936 | ||
937 | if (!have_chan_pwr) | |
1ea6f9c0 | 938 | return 0; |
04b7b2ff JB |
939 | |
940 | new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem); | |
941 | ||
1ea6f9c0 JB |
942 | if (sdata->ap_power_level == new_ap_level) |
943 | return 0; | |
04b7b2ff JB |
944 | |
945 | sdata_info(sdata, | |
946 | "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", | |
947 | new_ap_level, chan_pwr, *pwr_constr_elem, | |
948 | sdata->u.mgd.bssid); | |
1ea6f9c0 JB |
949 | sdata->ap_power_level = new_ap_level; |
950 | if (__ieee80211_recalc_txpower(sdata)) | |
951 | return BSS_CHANGED_TXPOWER; | |
952 | return 0; | |
cc32abd4 JB |
953 | } |
954 | ||
965bedad JB |
955 | /* powersave */ |
956 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
957 | struct ieee80211_sub_if_data *sdata) | |
958 | { | |
959 | struct ieee80211_conf *conf = &local->hw.conf; | |
960 | ||
d5edaedc JB |
961 | /* |
962 | * If we are scanning right now then the parameters will | |
963 | * take effect when scan finishes. | |
964 | */ | |
fbe9c429 | 965 | if (local->scanning) |
d5edaedc JB |
966 | return; |
967 | ||
965bedad JB |
968 | if (conf->dynamic_ps_timeout > 0 && |
969 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
970 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
971 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
972 | } else { | |
973 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
974 | ieee80211_send_nullfunc(local, sdata, 1); | |
375177bf | 975 | |
2a13052f JO |
976 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
977 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) | |
978 | return; | |
979 | ||
980 | conf->flags |= IEEE80211_CONF_PS; | |
981 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
965bedad JB |
982 | } |
983 | } | |
984 | ||
985 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
986 | { | |
987 | struct ieee80211_conf *conf = &local->hw.conf; | |
988 | ||
989 | if (local->ps_sdata) { | |
965bedad JB |
990 | ieee80211_enable_ps(local, local->ps_sdata); |
991 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
992 | conf->flags &= ~IEEE80211_CONF_PS; | |
993 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
994 | del_timer_sync(&local->dynamic_ps_timer); | |
995 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
996 | } | |
997 | } | |
998 | ||
808118cb JY |
999 | static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) |
1000 | { | |
1001 | struct ieee80211_if_managed *mgd = &sdata->u.mgd; | |
1002 | struct sta_info *sta = NULL; | |
c2c98fde | 1003 | bool authorized = false; |
808118cb JY |
1004 | |
1005 | if (!mgd->powersave) | |
1006 | return false; | |
1007 | ||
05cb9108 JB |
1008 | if (mgd->broken_ap) |
1009 | return false; | |
1010 | ||
808118cb JY |
1011 | if (!mgd->associated) |
1012 | return false; | |
1013 | ||
808118cb JY |
1014 | if (mgd->flags & (IEEE80211_STA_BEACON_POLL | |
1015 | IEEE80211_STA_CONNECTION_POLL)) | |
1016 | return false; | |
1017 | ||
1018 | rcu_read_lock(); | |
1019 | sta = sta_info_get(sdata, mgd->bssid); | |
1020 | if (sta) | |
c2c98fde | 1021 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
808118cb JY |
1022 | rcu_read_unlock(); |
1023 | ||
c2c98fde | 1024 | return authorized; |
808118cb JY |
1025 | } |
1026 | ||
965bedad | 1027 | /* need to hold RTNL or interface lock */ |
10f644a4 | 1028 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
1029 | { |
1030 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
1031 | int count = 0; | |
195e294d | 1032 | int timeout; |
965bedad JB |
1033 | |
1034 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
1035 | local->ps_sdata = NULL; | |
1036 | return; | |
1037 | } | |
1038 | ||
1039 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 1040 | if (!ieee80211_sdata_running(sdata)) |
965bedad | 1041 | continue; |
8c7914de RM |
1042 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
1043 | /* If an AP vif is found, then disable PS | |
1044 | * by setting the count to zero thereby setting | |
1045 | * ps_sdata to NULL. | |
1046 | */ | |
1047 | count = 0; | |
1048 | break; | |
1049 | } | |
965bedad JB |
1050 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
1051 | continue; | |
1052 | found = sdata; | |
1053 | count++; | |
1054 | } | |
1055 | ||
808118cb | 1056 | if (count == 1 && ieee80211_powersave_allowed(found)) { |
10f644a4 JB |
1057 | s32 beaconint_us; |
1058 | ||
1059 | if (latency < 0) | |
ed77134b | 1060 | latency = pm_qos_request(PM_QOS_NETWORK_LATENCY); |
10f644a4 JB |
1061 | |
1062 | beaconint_us = ieee80211_tu_to_usec( | |
1063 | found->vif.bss_conf.beacon_int); | |
1064 | ||
ff616381 | 1065 | timeout = local->dynamic_ps_forced_timeout; |
195e294d JO |
1066 | if (timeout < 0) { |
1067 | /* | |
ff616381 JO |
1068 | * Go to full PSM if the user configures a very low |
1069 | * latency requirement. | |
0ab82b04 EP |
1070 | * The 2000 second value is there for compatibility |
1071 | * until the PM_QOS_NETWORK_LATENCY is configured | |
1072 | * with real values. | |
195e294d | 1073 | */ |
0ab82b04 EP |
1074 | if (latency > (1900 * USEC_PER_MSEC) && |
1075 | latency != (2000 * USEC_PER_SEC)) | |
195e294d | 1076 | timeout = 0; |
ff616381 JO |
1077 | else |
1078 | timeout = 100; | |
195e294d | 1079 | } |
09b85568 | 1080 | local->hw.conf.dynamic_ps_timeout = timeout; |
195e294d | 1081 | |
04fe2037 | 1082 | if (beaconint_us > latency) { |
10f644a4 | 1083 | local->ps_sdata = NULL; |
04fe2037 | 1084 | } else { |
04fe2037 | 1085 | int maxslp = 1; |
826262c3 | 1086 | u8 dtimper = found->u.mgd.dtim_period; |
56007a02 JB |
1087 | |
1088 | /* If the TIM IE is invalid, pretend the value is 1 */ | |
1089 | if (!dtimper) | |
1090 | dtimper = 1; | |
1091 | else if (dtimper > 1) | |
04fe2037 JB |
1092 | maxslp = min_t(int, dtimper, |
1093 | latency / beaconint_us); | |
1094 | ||
9ccebe61 | 1095 | local->hw.conf.max_sleep_period = maxslp; |
56007a02 | 1096 | local->hw.conf.ps_dtim_period = dtimper; |
10f644a4 | 1097 | local->ps_sdata = found; |
04fe2037 | 1098 | } |
10f644a4 | 1099 | } else { |
965bedad | 1100 | local->ps_sdata = NULL; |
10f644a4 | 1101 | } |
965bedad JB |
1102 | |
1103 | ieee80211_change_ps(local); | |
1104 | } | |
1105 | ||
ab095877 EP |
1106 | void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) |
1107 | { | |
1108 | bool ps_allowed = ieee80211_powersave_allowed(sdata); | |
1109 | ||
1110 | if (sdata->vif.bss_conf.ps != ps_allowed) { | |
1111 | sdata->vif.bss_conf.ps = ps_allowed; | |
1112 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); | |
1113 | } | |
1114 | } | |
1115 | ||
965bedad JB |
1116 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) |
1117 | { | |
1118 | struct ieee80211_local *local = | |
1119 | container_of(work, struct ieee80211_local, | |
1120 | dynamic_ps_disable_work); | |
1121 | ||
1122 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
1123 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1124 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1125 | } | |
1126 | ||
1127 | ieee80211_wake_queues_by_reason(&local->hw, | |
1128 | IEEE80211_QUEUE_STOP_REASON_PS); | |
1129 | } | |
1130 | ||
1131 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
1132 | { | |
1133 | struct ieee80211_local *local = | |
1134 | container_of(work, struct ieee80211_local, | |
1135 | dynamic_ps_enable_work); | |
1136 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
5e34069c | 1137 | struct ieee80211_if_managed *ifmgd; |
1ddc2867 RM |
1138 | unsigned long flags; |
1139 | int q; | |
965bedad JB |
1140 | |
1141 | /* can only happen when PS was just disabled anyway */ | |
1142 | if (!sdata) | |
1143 | return; | |
1144 | ||
5e34069c CL |
1145 | ifmgd = &sdata->u.mgd; |
1146 | ||
965bedad JB |
1147 | if (local->hw.conf.flags & IEEE80211_CONF_PS) |
1148 | return; | |
1149 | ||
09b85568 | 1150 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
77b7023a AN |
1151 | /* don't enter PS if TX frames are pending */ |
1152 | if (drv_tx_frames_pending(local)) { | |
1ddc2867 RM |
1153 | mod_timer(&local->dynamic_ps_timer, jiffies + |
1154 | msecs_to_jiffies( | |
1155 | local->hw.conf.dynamic_ps_timeout)); | |
1156 | return; | |
1157 | } | |
77b7023a AN |
1158 | |
1159 | /* | |
1160 | * transmission can be stopped by others which leads to | |
1161 | * dynamic_ps_timer expiry. Postpone the ps timer if it | |
1162 | * is not the actual idle state. | |
1163 | */ | |
1164 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
1165 | for (q = 0; q < local->hw.queues; q++) { | |
1166 | if (local->queue_stop_reasons[q]) { | |
1167 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1168 | flags); | |
1169 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
1170 | msecs_to_jiffies( | |
1171 | local->hw.conf.dynamic_ps_timeout)); | |
1172 | return; | |
1173 | } | |
1174 | } | |
1175 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
1ddc2867 | 1176 | } |
1ddc2867 | 1177 | |
375177bf | 1178 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
9c38a8b4 | 1179 | !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
f3e85b9e | 1180 | netif_tx_stop_all_queues(sdata->dev); |
965bedad | 1181 | |
e8306f98 VN |
1182 | if (drv_tx_frames_pending(local)) |
1183 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
1184 | msecs_to_jiffies( | |
1185 | local->hw.conf.dynamic_ps_timeout)); | |
1186 | else { | |
1187 | ieee80211_send_nullfunc(local, sdata, 1); | |
1188 | /* Flush to get the tx status of nullfunc frame */ | |
1189 | drv_flush(local, false); | |
1190 | } | |
f3e85b9e VN |
1191 | } |
1192 | ||
2a13052f JO |
1193 | if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && |
1194 | (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) || | |
375177bf VN |
1195 | (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
1196 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; | |
1197 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
1198 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1199 | } | |
f3e85b9e | 1200 | |
77b7023a AN |
1201 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
1202 | netif_tx_wake_all_queues(sdata->dev); | |
965bedad JB |
1203 | } |
1204 | ||
1205 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
1206 | { | |
1207 | struct ieee80211_local *local = (void *) data; | |
1208 | ||
78f1a8b7 | 1209 | if (local->quiescing || local->suspended) |
5bb644a0 JB |
1210 | return; |
1211 | ||
42935eca | 1212 | ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
965bedad JB |
1213 | } |
1214 | ||
164eb02d SW |
1215 | void ieee80211_dfs_cac_timer_work(struct work_struct *work) |
1216 | { | |
1217 | struct delayed_work *delayed_work = | |
1218 | container_of(work, struct delayed_work, work); | |
1219 | struct ieee80211_sub_if_data *sdata = | |
1220 | container_of(delayed_work, struct ieee80211_sub_if_data, | |
1221 | dfs_cac_timer_work); | |
1222 | ||
1223 | ieee80211_vif_release_channel(sdata); | |
1224 | ||
1225 | cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL); | |
1226 | } | |
1227 | ||
60f8b39c | 1228 | /* MLME */ |
7d25745d | 1229 | static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, |
4ced3f74 | 1230 | struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1231 | u8 *wmm_param, size_t wmm_param_len) |
1232 | { | |
f0706e82 | 1233 | struct ieee80211_tx_queue_params params; |
4ced3f74 | 1234 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1235 | size_t left; |
1236 | int count; | |
ab13315a | 1237 | u8 *pos, uapsd_queues = 0; |
f0706e82 | 1238 | |
e1b3ec1a | 1239 | if (!local->ops->conf_tx) |
7d25745d | 1240 | return false; |
e1b3ec1a | 1241 | |
32c5057b | 1242 | if (local->hw.queues < IEEE80211_NUM_ACS) |
7d25745d | 1243 | return false; |
3434fbd3 JB |
1244 | |
1245 | if (!wmm_param) | |
7d25745d | 1246 | return false; |
3434fbd3 | 1247 | |
f0706e82 | 1248 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
7d25745d | 1249 | return false; |
ab13315a KV |
1250 | |
1251 | if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) | |
dc41e4d4 | 1252 | uapsd_queues = ifmgd->uapsd_queues; |
ab13315a | 1253 | |
f0706e82 | 1254 | count = wmm_param[6] & 0x0f; |
46900298 | 1255 | if (count == ifmgd->wmm_last_param_set) |
7d25745d | 1256 | return false; |
46900298 | 1257 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
1258 | |
1259 | pos = wmm_param + 8; | |
1260 | left = wmm_param_len - 8; | |
1261 | ||
1262 | memset(¶ms, 0, sizeof(params)); | |
1263 | ||
00e96dec | 1264 | sdata->wmm_acm = 0; |
f0706e82 JB |
1265 | for (; left >= 4; left -= 4, pos += 4) { |
1266 | int aci = (pos[0] >> 5) & 0x03; | |
1267 | int acm = (pos[0] >> 4) & 0x01; | |
ab13315a | 1268 | bool uapsd = false; |
f0706e82 JB |
1269 | int queue; |
1270 | ||
1271 | switch (aci) { | |
0eeb59fe | 1272 | case 1: /* AC_BK */ |
e100bb64 | 1273 | queue = 3; |
988c0f72 | 1274 | if (acm) |
00e96dec | 1275 | sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
ab13315a KV |
1276 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) |
1277 | uapsd = true; | |
f0706e82 | 1278 | break; |
0eeb59fe | 1279 | case 2: /* AC_VI */ |
e100bb64 | 1280 | queue = 1; |
988c0f72 | 1281 | if (acm) |
00e96dec | 1282 | sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
ab13315a KV |
1283 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) |
1284 | uapsd = true; | |
f0706e82 | 1285 | break; |
0eeb59fe | 1286 | case 3: /* AC_VO */ |
e100bb64 | 1287 | queue = 0; |
988c0f72 | 1288 | if (acm) |
00e96dec | 1289 | sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
ab13315a KV |
1290 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) |
1291 | uapsd = true; | |
f0706e82 | 1292 | break; |
0eeb59fe | 1293 | case 0: /* AC_BE */ |
f0706e82 | 1294 | default: |
e100bb64 | 1295 | queue = 2; |
988c0f72 | 1296 | if (acm) |
00e96dec | 1297 | sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
ab13315a KV |
1298 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) |
1299 | uapsd = true; | |
f0706e82 JB |
1300 | break; |
1301 | } | |
1302 | ||
1303 | params.aifs = pos[0] & 0x0f; | |
1304 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
1305 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 1306 | params.txop = get_unaligned_le16(pos + 2); |
ab13315a KV |
1307 | params.uapsd = uapsd; |
1308 | ||
bdcbd8e0 JB |
1309 | mlme_dbg(sdata, |
1310 | "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n", | |
1311 | queue, aci, acm, | |
1312 | params.aifs, params.cw_min, params.cw_max, | |
1313 | params.txop, params.uapsd); | |
f6f3def3 EP |
1314 | sdata->tx_conf[queue] = params; |
1315 | if (drv_conf_tx(local, sdata, queue, ¶ms)) | |
bdcbd8e0 JB |
1316 | sdata_err(sdata, |
1317 | "failed to set TX queue parameters for queue %d\n", | |
1318 | queue); | |
f0706e82 | 1319 | } |
e1b3ec1a SG |
1320 | |
1321 | /* enable WMM or activate new settings */ | |
4ced3f74 | 1322 | sdata->vif.bss_conf.qos = true; |
7d25745d | 1323 | return true; |
f0706e82 JB |
1324 | } |
1325 | ||
925e64c3 SG |
1326 | static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) |
1327 | { | |
1328 | lockdep_assert_held(&sdata->local->mtx); | |
1329 | ||
1330 | sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1331 | IEEE80211_STA_BEACON_POLL); | |
1332 | ieee80211_run_deferred_scan(sdata->local); | |
1333 | } | |
1334 | ||
1335 | static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) | |
1336 | { | |
1337 | mutex_lock(&sdata->local->mtx); | |
1338 | __ieee80211_stop_poll(sdata); | |
1339 | mutex_unlock(&sdata->local->mtx); | |
1340 | } | |
1341 | ||
7a5158ef JB |
1342 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
1343 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 1344 | { |
bda3933a | 1345 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
471b3efd | 1346 | u32 changed = 0; |
7a5158ef JB |
1347 | bool use_protection; |
1348 | bool use_short_preamble; | |
1349 | bool use_short_slot; | |
1350 | ||
1351 | if (erp_valid) { | |
1352 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
1353 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
1354 | } else { | |
1355 | use_protection = false; | |
1356 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
1357 | } | |
1358 | ||
1359 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
55de908a | 1360 | if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ) |
43d35343 | 1361 | use_short_slot = true; |
5628221c | 1362 | |
471b3efd | 1363 | if (use_protection != bss_conf->use_cts_prot) { |
471b3efd JB |
1364 | bss_conf->use_cts_prot = use_protection; |
1365 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 1366 | } |
7e9ed188 | 1367 | |
d43c7b37 | 1368 | if (use_short_preamble != bss_conf->use_short_preamble) { |
d43c7b37 | 1369 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 1370 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 1371 | } |
d9430a32 | 1372 | |
7a5158ef | 1373 | if (use_short_slot != bss_conf->use_short_slot) { |
7a5158ef JB |
1374 | bss_conf->use_short_slot = use_short_slot; |
1375 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
1376 | } |
1377 | ||
1378 | return changed; | |
1379 | } | |
1380 | ||
f698d856 | 1381 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
0c1ad2ca | 1382 | struct cfg80211_bss *cbss, |
ae5eb026 | 1383 | u32 bss_info_changed) |
f0706e82 | 1384 | { |
0c1ad2ca | 1385 | struct ieee80211_bss *bss = (void *)cbss->priv; |
471b3efd | 1386 | struct ieee80211_local *local = sdata->local; |
68542962 | 1387 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
d6f2da5b | 1388 | |
ae5eb026 | 1389 | bss_info_changed |= BSS_CHANGED_ASSOC; |
77fdaa12 | 1390 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
50ae34a2 | 1391 | bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); |
21c0cbe7 | 1392 | |
7ccc8bd7 FF |
1393 | sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( |
1394 | IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int)); | |
1395 | ||
0c1ad2ca JB |
1396 | sdata->u.mgd.associated = cbss; |
1397 | memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); | |
f0706e82 | 1398 | |
17e4ec14 JM |
1399 | sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; |
1400 | ||
488dd7b5 | 1401 | if (sdata->vif.p2p) { |
9caf0364 | 1402 | const struct cfg80211_bss_ies *ies; |
488dd7b5 | 1403 | |
9caf0364 JB |
1404 | rcu_read_lock(); |
1405 | ies = rcu_dereference(cbss->ies); | |
1406 | if (ies) { | |
1407 | u8 noa[2]; | |
1408 | int ret; | |
1409 | ||
1410 | ret = cfg80211_get_p2p_attr( | |
1411 | ies->data, ies->len, | |
1412 | IEEE80211_P2P_ATTR_ABSENCE_NOTICE, | |
1413 | noa, sizeof(noa)); | |
1414 | if (ret >= 2) { | |
1415 | bss_conf->p2p_oppps = noa[1] & 0x80; | |
1416 | bss_conf->p2p_ctwindow = noa[1] & 0x7f; | |
1417 | bss_info_changed |= BSS_CHANGED_P2P_PS; | |
1418 | sdata->u.mgd.p2p_noa_index = noa[0]; | |
1419 | } | |
488dd7b5 | 1420 | } |
9caf0364 | 1421 | rcu_read_unlock(); |
488dd7b5 JB |
1422 | } |
1423 | ||
b291ba11 | 1424 | /* just to be sure */ |
925e64c3 | 1425 | ieee80211_stop_poll(sdata); |
b291ba11 | 1426 | |
9ac19a90 | 1427 | ieee80211_led_assoc(local, 1); |
9306102e | 1428 | |
c65dd147 | 1429 | if (sdata->u.mgd.assoc_data->have_beacon) { |
826262c3 JB |
1430 | /* |
1431 | * If the AP is buggy we may get here with no DTIM period | |
1432 | * known, so assume it's 1 which is the only safe assumption | |
1433 | * in that case, although if the TIM IE is broken powersave | |
1434 | * probably just won't work at all. | |
1435 | */ | |
1436 | bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; | |
c65dd147 | 1437 | bss_info_changed |= BSS_CHANGED_DTIM_PERIOD; |
826262c3 | 1438 | } else { |
e5b900d2 | 1439 | bss_conf->dtim_period = 0; |
826262c3 | 1440 | } |
e5b900d2 | 1441 | |
68542962 | 1442 | bss_conf->assoc = 1; |
9cef8737 | 1443 | |
a97c13c3 | 1444 | /* Tell the driver to monitor connection quality (if supported) */ |
ea086359 | 1445 | if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && |
68542962 | 1446 | bss_conf->cqm_rssi_thold) |
a97c13c3 JO |
1447 | bss_info_changed |= BSS_CHANGED_CQM; |
1448 | ||
68542962 | 1449 | /* Enable ARP filtering */ |
0f19b41e | 1450 | if (bss_conf->arp_addr_cnt) |
68542962 | 1451 | bss_info_changed |= BSS_CHANGED_ARP_FILTER; |
68542962 | 1452 | |
ae5eb026 | 1453 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
f0706e82 | 1454 | |
056508dc JB |
1455 | mutex_lock(&local->iflist_mtx); |
1456 | ieee80211_recalc_ps(local, -1); | |
1457 | mutex_unlock(&local->iflist_mtx); | |
e0cb686f | 1458 | |
04ecd257 | 1459 | ieee80211_recalc_smps(sdata); |
ab095877 EP |
1460 | ieee80211_recalc_ps_vif(sdata); |
1461 | ||
8a5b33f5 | 1462 | netif_tx_start_all_queues(sdata->dev); |
9ac19a90 | 1463 | netif_carrier_on(sdata->dev); |
f0706e82 JB |
1464 | } |
1465 | ||
e69e95db | 1466 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
37ad3888 JB |
1467 | u16 stype, u16 reason, bool tx, |
1468 | u8 *frame_buf) | |
aa458d17 | 1469 | { |
46900298 | 1470 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 | 1471 | struct ieee80211_local *local = sdata->local; |
3cc5240b | 1472 | u32 changed = 0; |
aa458d17 | 1473 | |
77fdaa12 JB |
1474 | ASSERT_MGD_MTX(ifmgd); |
1475 | ||
37ad3888 JB |
1476 | if (WARN_ON_ONCE(tx && !frame_buf)) |
1477 | return; | |
1478 | ||
b291ba11 JB |
1479 | if (WARN_ON(!ifmgd->associated)) |
1480 | return; | |
1481 | ||
79543d8e DS |
1482 | ieee80211_stop_poll(sdata); |
1483 | ||
77fdaa12 | 1484 | ifmgd->associated = NULL; |
77fdaa12 JB |
1485 | |
1486 | /* | |
1487 | * we need to commit the associated = NULL change because the | |
1488 | * scan code uses that to determine whether this iface should | |
1489 | * go to/wake up from powersave or not -- and could otherwise | |
1490 | * wake the queues erroneously. | |
1491 | */ | |
1492 | smp_mb(); | |
1493 | ||
1494 | /* | |
1495 | * Thus, we can only afterwards stop the queues -- to account | |
1496 | * for the case where another CPU is finishing a scan at this | |
1497 | * time -- we don't want the scan code to enable queues. | |
1498 | */ | |
aa458d17 | 1499 | |
8a5b33f5 | 1500 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
1501 | netif_carrier_off(sdata->dev); |
1502 | ||
88bc40e8 EP |
1503 | /* |
1504 | * if we want to get out of ps before disassoc (why?) we have | |
1505 | * to do it before sending disassoc, as otherwise the null-packet | |
1506 | * won't be valid. | |
1507 | */ | |
1508 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
1509 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1510 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1511 | } | |
1512 | local->ps_sdata = NULL; | |
1513 | ||
ab095877 EP |
1514 | /* disable per-vif ps */ |
1515 | ieee80211_recalc_ps_vif(sdata); | |
1516 | ||
f823981e EP |
1517 | /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */ |
1518 | if (tx) | |
1519 | drv_flush(local, false); | |
1520 | ||
37ad3888 JB |
1521 | /* deauthenticate/disassociate now */ |
1522 | if (tx || frame_buf) | |
88a9e31c EP |
1523 | ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, |
1524 | reason, tx, frame_buf); | |
37ad3888 JB |
1525 | |
1526 | /* flush out frame */ | |
1527 | if (tx) | |
1528 | drv_flush(local, false); | |
1529 | ||
88a9e31c EP |
1530 | /* clear bssid only after building the needed mgmt frames */ |
1531 | memset(ifmgd->bssid, 0, ETH_ALEN); | |
1532 | ||
37ad3888 | 1533 | /* remove AP and TDLS peers */ |
051007d9 | 1534 | sta_info_flush_defer(sdata); |
37ad3888 JB |
1535 | |
1536 | /* finally reset all BSS / config parameters */ | |
f5e5bf25 TW |
1537 | changed |= ieee80211_reset_erp_info(sdata); |
1538 | ||
f5e5bf25 | 1539 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
1540 | changed |= BSS_CHANGED_ASSOC; |
1541 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 1542 | |
488dd7b5 JB |
1543 | sdata->vif.bss_conf.p2p_ctwindow = 0; |
1544 | sdata->vif.bss_conf.p2p_oppps = false; | |
1545 | ||
413ad50a | 1546 | /* on the next assoc, re-program HT parameters */ |
ef96a842 BG |
1547 | memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); |
1548 | memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); | |
413ad50a | 1549 | |
1ea6f9c0 | 1550 | sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; |
a8302de9 | 1551 | |
520eb820 KV |
1552 | del_timer_sync(&local->dynamic_ps_timer); |
1553 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
1554 | ||
68542962 | 1555 | /* Disable ARP filtering */ |
0f19b41e | 1556 | if (sdata->vif.bss_conf.arp_addr_cnt) |
68542962 | 1557 | changed |= BSS_CHANGED_ARP_FILTER; |
68542962 | 1558 | |
3abead59 JB |
1559 | sdata->vif.bss_conf.qos = false; |
1560 | changed |= BSS_CHANGED_QOS; | |
1561 | ||
0aaffa9b JB |
1562 | /* The BSSID (not really interesting) and HT changed */ |
1563 | changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; | |
ae5eb026 | 1564 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 | 1565 | |
3abead59 JB |
1566 | /* disassociated - set to defaults now */ |
1567 | ieee80211_set_wmm_default(sdata, false); | |
1568 | ||
b9dcf712 JB |
1569 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
1570 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); | |
1571 | del_timer_sync(&sdata->u.mgd.timer); | |
1572 | del_timer_sync(&sdata->u.mgd.chswitch_timer); | |
2d9957cc JB |
1573 | |
1574 | sdata->u.mgd.timers_running = 0; | |
028e8da0 | 1575 | |
826262c3 JB |
1576 | sdata->vif.bss_conf.dtim_period = 0; |
1577 | ||
028e8da0 JB |
1578 | ifmgd->flags = 0; |
1579 | ieee80211_vif_release_channel(sdata); | |
aa458d17 | 1580 | } |
f0706e82 | 1581 | |
3cf335d5 KV |
1582 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
1583 | struct ieee80211_hdr *hdr) | |
1584 | { | |
1585 | /* | |
1586 | * We can postpone the mgd.timer whenever receiving unicast frames | |
1587 | * from AP because we know that the connection is working both ways | |
1588 | * at that time. But multicast frames (and hence also beacons) must | |
1589 | * be ignored here, because we need to trigger the timer during | |
b291ba11 JB |
1590 | * data idle periods for sending the periodic probe request to the |
1591 | * AP we're connected to. | |
3cf335d5 | 1592 | */ |
b291ba11 JB |
1593 | if (is_multicast_ether_addr(hdr->addr1)) |
1594 | return; | |
1595 | ||
be099e82 | 1596 | ieee80211_sta_reset_conn_monitor(sdata); |
3cf335d5 | 1597 | } |
f0706e82 | 1598 | |
4e5ff376 FF |
1599 | static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) |
1600 | { | |
1601 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
133d40f9 | 1602 | struct ieee80211_local *local = sdata->local; |
4e5ff376 | 1603 | |
133d40f9 | 1604 | mutex_lock(&local->mtx); |
4e5ff376 | 1605 | if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
133d40f9 SG |
1606 | IEEE80211_STA_CONNECTION_POLL))) { |
1607 | mutex_unlock(&local->mtx); | |
1608 | return; | |
1609 | } | |
4e5ff376 | 1610 | |
925e64c3 | 1611 | __ieee80211_stop_poll(sdata); |
133d40f9 SG |
1612 | |
1613 | mutex_lock(&local->iflist_mtx); | |
1614 | ieee80211_recalc_ps(local, -1); | |
1615 | mutex_unlock(&local->iflist_mtx); | |
4e5ff376 FF |
1616 | |
1617 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) | |
133d40f9 | 1618 | goto out; |
4e5ff376 FF |
1619 | |
1620 | /* | |
1621 | * We've received a probe response, but are not sure whether | |
1622 | * we have or will be receiving any beacons or data, so let's | |
1623 | * schedule the timers again, just in case. | |
1624 | */ | |
1625 | ieee80211_sta_reset_beacon_monitor(sdata); | |
1626 | ||
1627 | mod_timer(&ifmgd->conn_mon_timer, | |
1628 | round_jiffies_up(jiffies + | |
1629 | IEEE80211_CONNECTION_IDLE_TIME)); | |
133d40f9 | 1630 | out: |
133d40f9 | 1631 | mutex_unlock(&local->mtx); |
4e5ff376 FF |
1632 | } |
1633 | ||
1634 | void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, | |
04ac3c0e | 1635 | struct ieee80211_hdr *hdr, bool ack) |
4e5ff376 | 1636 | { |
75706d0e | 1637 | if (!ieee80211_is_data(hdr->frame_control)) |
4e5ff376 FF |
1638 | return; |
1639 | ||
4e5ff376 FF |
1640 | if (ieee80211_is_nullfunc(hdr->frame_control) && |
1641 | sdata->u.mgd.probe_send_count > 0) { | |
04ac3c0e | 1642 | if (ack) |
cab1c7fd | 1643 | ieee80211_sta_reset_conn_monitor(sdata); |
04ac3c0e FF |
1644 | else |
1645 | sdata->u.mgd.nullfunc_failed = true; | |
4e5ff376 | 1646 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
cab1c7fd | 1647 | return; |
4e5ff376 | 1648 | } |
cab1c7fd WD |
1649 | |
1650 | if (ack) | |
1651 | ieee80211_sta_reset_conn_monitor(sdata); | |
4e5ff376 FF |
1652 | } |
1653 | ||
a43abf29 ML |
1654 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
1655 | { | |
1656 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1657 | const u8 *ssid; | |
f01a067d | 1658 | u8 *dst = ifmgd->associated->bssid; |
180205bd | 1659 | u8 unicast_limit = max(1, max_probe_tries - 3); |
f01a067d LR |
1660 | |
1661 | /* | |
1662 | * Try sending broadcast probe requests for the last three | |
1663 | * probe requests after the first ones failed since some | |
1664 | * buggy APs only support broadcast probe requests. | |
1665 | */ | |
1666 | if (ifmgd->probe_send_count >= unicast_limit) | |
1667 | dst = NULL; | |
a43abf29 | 1668 | |
4e5ff376 FF |
1669 | /* |
1670 | * When the hardware reports an accurate Tx ACK status, it's | |
1671 | * better to send a nullfunc frame instead of a probe request, | |
1672 | * as it will kick us off the AP quickly if we aren't associated | |
1673 | * anymore. The timeout will be reset if the frame is ACKed by | |
1674 | * the AP. | |
1675 | */ | |
992e68bf SD |
1676 | ifmgd->probe_send_count++; |
1677 | ||
04ac3c0e FF |
1678 | if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
1679 | ifmgd->nullfunc_failed = false; | |
4e5ff376 | 1680 | ieee80211_send_nullfunc(sdata->local, sdata, 0); |
04ac3c0e | 1681 | } else { |
88c868c4 SG |
1682 | int ssid_len; |
1683 | ||
9caf0364 | 1684 | rcu_read_lock(); |
4e5ff376 | 1685 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); |
88c868c4 SG |
1686 | if (WARN_ON_ONCE(ssid == NULL)) |
1687 | ssid_len = 0; | |
1688 | else | |
1689 | ssid_len = ssid[1]; | |
1690 | ||
1691 | ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL, | |
1672c0e3 | 1692 | 0, (u32) -1, true, 0, |
55de908a | 1693 | ifmgd->associated->channel, false); |
9caf0364 | 1694 | rcu_read_unlock(); |
4e5ff376 | 1695 | } |
a43abf29 | 1696 | |
180205bd | 1697 | ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); |
a43abf29 | 1698 | run_again(ifmgd, ifmgd->probe_timeout); |
f69b9c79 RM |
1699 | if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
1700 | drv_flush(sdata->local, false); | |
a43abf29 ML |
1701 | } |
1702 | ||
b291ba11 JB |
1703 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
1704 | bool beacon) | |
04de8381 | 1705 | { |
04de8381 | 1706 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
b291ba11 | 1707 | bool already = false; |
34bfc411 | 1708 | |
9607e6b6 | 1709 | if (!ieee80211_sdata_running(sdata)) |
0e2b6286 JB |
1710 | return; |
1711 | ||
77fdaa12 JB |
1712 | mutex_lock(&ifmgd->mtx); |
1713 | ||
1714 | if (!ifmgd->associated) | |
1715 | goto out; | |
1716 | ||
133d40f9 SG |
1717 | mutex_lock(&sdata->local->mtx); |
1718 | ||
1719 | if (sdata->local->tmp_channel || sdata->local->scanning) { | |
1720 | mutex_unlock(&sdata->local->mtx); | |
1721 | goto out; | |
1722 | } | |
1723 | ||
e87cc472 | 1724 | if (beacon) |
bdcbd8e0 | 1725 | mlme_dbg_ratelimited(sdata, |
112c31f0 | 1726 | "detected beacon loss from AP - probing\n"); |
bdcbd8e0 | 1727 | |
6efb71b0 HS |
1728 | ieee80211_cqm_rssi_notify(&sdata->vif, |
1729 | NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL); | |
04de8381 | 1730 | |
b291ba11 JB |
1731 | /* |
1732 | * The driver/our work has already reported this event or the | |
1733 | * connection monitoring has kicked in and we have already sent | |
1734 | * a probe request. Or maybe the AP died and the driver keeps | |
1735 | * reporting until we disassociate... | |
1736 | * | |
1737 | * In either case we have to ignore the current call to this | |
1738 | * function (except for setting the correct probe reason bit) | |
1739 | * because otherwise we would reset the timer every time and | |
1740 | * never check whether we received a probe response! | |
1741 | */ | |
1742 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | | |
1743 | IEEE80211_STA_CONNECTION_POLL)) | |
1744 | already = true; | |
1745 | ||
1746 | if (beacon) | |
1747 | ifmgd->flags |= IEEE80211_STA_BEACON_POLL; | |
1748 | else | |
1749 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; | |
1750 | ||
133d40f9 SG |
1751 | mutex_unlock(&sdata->local->mtx); |
1752 | ||
b291ba11 JB |
1753 | if (already) |
1754 | goto out; | |
1755 | ||
4e751843 JB |
1756 | mutex_lock(&sdata->local->iflist_mtx); |
1757 | ieee80211_recalc_ps(sdata->local, -1); | |
1758 | mutex_unlock(&sdata->local->iflist_mtx); | |
1759 | ||
a43abf29 ML |
1760 | ifmgd->probe_send_count = 0; |
1761 | ieee80211_mgd_probe_ap_send(sdata); | |
77fdaa12 JB |
1762 | out: |
1763 | mutex_unlock(&ifmgd->mtx); | |
04de8381 KV |
1764 | } |
1765 | ||
a619a4c0 JO |
1766 | struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, |
1767 | struct ieee80211_vif *vif) | |
1768 | { | |
1769 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1770 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
d9b3b28b | 1771 | struct cfg80211_bss *cbss; |
a619a4c0 JO |
1772 | struct sk_buff *skb; |
1773 | const u8 *ssid; | |
88c868c4 | 1774 | int ssid_len; |
a619a4c0 JO |
1775 | |
1776 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1777 | return NULL; | |
1778 | ||
1779 | ASSERT_MGD_MTX(ifmgd); | |
1780 | ||
d9b3b28b EP |
1781 | if (ifmgd->associated) |
1782 | cbss = ifmgd->associated; | |
1783 | else if (ifmgd->auth_data) | |
1784 | cbss = ifmgd->auth_data->bss; | |
1785 | else if (ifmgd->assoc_data) | |
1786 | cbss = ifmgd->assoc_data->bss; | |
1787 | else | |
a619a4c0 JO |
1788 | return NULL; |
1789 | ||
9caf0364 | 1790 | rcu_read_lock(); |
d9b3b28b | 1791 | ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); |
88c868c4 SG |
1792 | if (WARN_ON_ONCE(ssid == NULL)) |
1793 | ssid_len = 0; | |
1794 | else | |
1795 | ssid_len = ssid[1]; | |
1796 | ||
d9b3b28b | 1797 | skb = ieee80211_build_probe_req(sdata, cbss->bssid, |
55de908a | 1798 | (u32) -1, cbss->channel, |
6b77863b | 1799 | ssid + 2, ssid_len, |
85a237fe | 1800 | NULL, 0, true); |
9caf0364 | 1801 | rcu_read_unlock(); |
a619a4c0 JO |
1802 | |
1803 | return skb; | |
1804 | } | |
1805 | EXPORT_SYMBOL(ieee80211_ap_probereq_get); | |
1806 | ||
eef9e54c | 1807 | static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) |
1e4dcd01 JO |
1808 | { |
1809 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
6ae16775 | 1810 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
1e4dcd01 JO |
1811 | |
1812 | mutex_lock(&ifmgd->mtx); | |
1813 | if (!ifmgd->associated) { | |
1814 | mutex_unlock(&ifmgd->mtx); | |
1815 | return; | |
1816 | } | |
1817 | ||
37ad3888 JB |
1818 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
1819 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, | |
eef9e54c | 1820 | true, frame_buf); |
882a7c69 | 1821 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; |
5b36ebd8 JB |
1822 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
1823 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
1e4dcd01 | 1824 | mutex_unlock(&ifmgd->mtx); |
7da7cc1d | 1825 | |
1e4dcd01 JO |
1826 | /* |
1827 | * must be outside lock due to cfg80211, | |
1828 | * but that's not a problem. | |
1829 | */ | |
6ae16775 | 1830 | cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN); |
1e4dcd01 JO |
1831 | } |
1832 | ||
cc74c0c7 | 1833 | static void ieee80211_beacon_connection_loss_work(struct work_struct *work) |
b291ba11 JB |
1834 | { |
1835 | struct ieee80211_sub_if_data *sdata = | |
1836 | container_of(work, struct ieee80211_sub_if_data, | |
1e4dcd01 | 1837 | u.mgd.beacon_connection_loss_work); |
a85e1d55 PS |
1838 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1839 | struct sta_info *sta; | |
1840 | ||
1841 | if (ifmgd->associated) { | |
30fa9047 | 1842 | rcu_read_lock(); |
a85e1d55 PS |
1843 | sta = sta_info_get(sdata, ifmgd->bssid); |
1844 | if (sta) | |
1845 | sta->beacon_loss_count++; | |
30fa9047 | 1846 | rcu_read_unlock(); |
a85e1d55 | 1847 | } |
b291ba11 | 1848 | |
682bd38b | 1849 | if (ifmgd->connection_loss) { |
882a7c69 JB |
1850 | sdata_info(sdata, "Connection to AP %pM lost\n", |
1851 | ifmgd->bssid); | |
eef9e54c | 1852 | __ieee80211_disconnect(sdata); |
882a7c69 | 1853 | } else { |
1e4dcd01 | 1854 | ieee80211_mgd_probe_ap(sdata, true); |
882a7c69 JB |
1855 | } |
1856 | } | |
1857 | ||
1858 | static void ieee80211_csa_connection_drop_work(struct work_struct *work) | |
1859 | { | |
1860 | struct ieee80211_sub_if_data *sdata = | |
1861 | container_of(work, struct ieee80211_sub_if_data, | |
1862 | u.mgd.csa_connection_drop_work); | |
1863 | ||
eef9e54c | 1864 | __ieee80211_disconnect(sdata); |
b291ba11 JB |
1865 | } |
1866 | ||
04de8381 KV |
1867 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
1868 | { | |
1869 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1e4dcd01 | 1870 | struct ieee80211_hw *hw = &sdata->local->hw; |
04de8381 | 1871 | |
b5878a2d JB |
1872 | trace_api_beacon_loss(sdata); |
1873 | ||
1e4dcd01 | 1874 | WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR); |
682bd38b | 1875 | sdata->u.mgd.connection_loss = false; |
1e4dcd01 | 1876 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); |
04de8381 KV |
1877 | } |
1878 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1879 | ||
1e4dcd01 JO |
1880 | void ieee80211_connection_loss(struct ieee80211_vif *vif) |
1881 | { | |
1882 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1883 | struct ieee80211_hw *hw = &sdata->local->hw; | |
1884 | ||
b5878a2d JB |
1885 | trace_api_connection_loss(sdata); |
1886 | ||
682bd38b | 1887 | sdata->u.mgd.connection_loss = true; |
1e4dcd01 JO |
1888 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); |
1889 | } | |
1890 | EXPORT_SYMBOL(ieee80211_connection_loss); | |
1891 | ||
1892 | ||
66e67e41 JB |
1893 | static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, |
1894 | bool assoc) | |
1895 | { | |
1896 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; | |
1897 | ||
1898 | lockdep_assert_held(&sdata->u.mgd.mtx); | |
1899 | ||
66e67e41 JB |
1900 | if (!assoc) { |
1901 | sta_info_destroy_addr(sdata, auth_data->bss->bssid); | |
1902 | ||
1903 | memset(sdata->u.mgd.bssid, 0, ETH_ALEN); | |
1904 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
028e8da0 | 1905 | sdata->u.mgd.flags = 0; |
55de908a | 1906 | ieee80211_vif_release_channel(sdata); |
66e67e41 JB |
1907 | } |
1908 | ||
5b112d3d | 1909 | cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); |
66e67e41 JB |
1910 | kfree(auth_data); |
1911 | sdata->u.mgd.auth_data = NULL; | |
1912 | } | |
1913 | ||
1914 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, | |
1915 | struct ieee80211_mgmt *mgmt, size_t len) | |
1916 | { | |
1672c0e3 | 1917 | struct ieee80211_local *local = sdata->local; |
66e67e41 JB |
1918 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; |
1919 | u8 *pos; | |
1920 | struct ieee802_11_elems elems; | |
1672c0e3 | 1921 | u32 tx_flags = 0; |
66e67e41 JB |
1922 | |
1923 | pos = mgmt->u.auth.variable; | |
1924 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1925 | if (!elems.challenge) | |
1926 | return; | |
1927 | auth_data->expected_transaction = 4; | |
a1845fc7 | 1928 | drv_mgd_prepare_tx(sdata->local, sdata); |
1672c0e3 JB |
1929 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
1930 | tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | | |
1931 | IEEE80211_TX_INTFL_MLME_CONN_TX; | |
700e8ea6 | 1932 | ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, |
66e67e41 JB |
1933 | elems.challenge - 2, elems.challenge_len + 2, |
1934 | auth_data->bss->bssid, auth_data->bss->bssid, | |
1935 | auth_data->key, auth_data->key_len, | |
1672c0e3 | 1936 | auth_data->key_idx, tx_flags); |
66e67e41 JB |
1937 | } |
1938 | ||
1939 | static enum rx_mgmt_action __must_check | |
1940 | ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, | |
1941 | struct ieee80211_mgmt *mgmt, size_t len) | |
1942 | { | |
1943 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1944 | u8 bssid[ETH_ALEN]; | |
1945 | u16 auth_alg, auth_transaction, status_code; | |
1946 | struct sta_info *sta; | |
1947 | ||
1948 | lockdep_assert_held(&ifmgd->mtx); | |
1949 | ||
1950 | if (len < 24 + 6) | |
1951 | return RX_MGMT_NONE; | |
1952 | ||
1953 | if (!ifmgd->auth_data || ifmgd->auth_data->done) | |
1954 | return RX_MGMT_NONE; | |
1955 | ||
1956 | memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); | |
1957 | ||
b203ca39 | 1958 | if (!ether_addr_equal(bssid, mgmt->bssid)) |
66e67e41 JB |
1959 | return RX_MGMT_NONE; |
1960 | ||
1961 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1962 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1963 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1964 | ||
1965 | if (auth_alg != ifmgd->auth_data->algorithm || | |
0f4126e8 JM |
1966 | auth_transaction != ifmgd->auth_data->expected_transaction) { |
1967 | sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", | |
1968 | mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, | |
1969 | auth_transaction, | |
1970 | ifmgd->auth_data->expected_transaction); | |
66e67e41 | 1971 | return RX_MGMT_NONE; |
0f4126e8 | 1972 | } |
66e67e41 JB |
1973 | |
1974 | if (status_code != WLAN_STATUS_SUCCESS) { | |
bdcbd8e0 JB |
1975 | sdata_info(sdata, "%pM denied authentication (status %d)\n", |
1976 | mgmt->sa, status_code); | |
dac211ec EP |
1977 | ieee80211_destroy_auth_data(sdata, false); |
1978 | return RX_MGMT_CFG80211_RX_AUTH; | |
66e67e41 JB |
1979 | } |
1980 | ||
1981 | switch (ifmgd->auth_data->algorithm) { | |
1982 | case WLAN_AUTH_OPEN: | |
1983 | case WLAN_AUTH_LEAP: | |
1984 | case WLAN_AUTH_FT: | |
6b8ece3a | 1985 | case WLAN_AUTH_SAE: |
66e67e41 JB |
1986 | break; |
1987 | case WLAN_AUTH_SHARED_KEY: | |
1988 | if (ifmgd->auth_data->expected_transaction != 4) { | |
1989 | ieee80211_auth_challenge(sdata, mgmt, len); | |
1990 | /* need another frame */ | |
1991 | return RX_MGMT_NONE; | |
1992 | } | |
1993 | break; | |
1994 | default: | |
1995 | WARN_ONCE(1, "invalid auth alg %d", | |
1996 | ifmgd->auth_data->algorithm); | |
1997 | return RX_MGMT_NONE; | |
1998 | } | |
1999 | ||
bdcbd8e0 | 2000 | sdata_info(sdata, "authenticated\n"); |
66e67e41 JB |
2001 | ifmgd->auth_data->done = true; |
2002 | ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; | |
89afe614 | 2003 | ifmgd->auth_data->timeout_started = true; |
66e67e41 JB |
2004 | run_again(ifmgd, ifmgd->auth_data->timeout); |
2005 | ||
6b8ece3a JM |
2006 | if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && |
2007 | ifmgd->auth_data->expected_transaction != 2) { | |
2008 | /* | |
2009 | * Report auth frame to user space for processing since another | |
2010 | * round of Authentication frames is still needed. | |
2011 | */ | |
2012 | return RX_MGMT_CFG80211_RX_AUTH; | |
2013 | } | |
2014 | ||
66e67e41 JB |
2015 | /* move station state to auth */ |
2016 | mutex_lock(&sdata->local->sta_mtx); | |
2017 | sta = sta_info_get(sdata, bssid); | |
2018 | if (!sta) { | |
2019 | WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); | |
2020 | goto out_err; | |
2021 | } | |
2022 | if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { | |
bdcbd8e0 | 2023 | sdata_info(sdata, "failed moving %pM to auth\n", bssid); |
66e67e41 JB |
2024 | goto out_err; |
2025 | } | |
2026 | mutex_unlock(&sdata->local->sta_mtx); | |
2027 | ||
2028 | return RX_MGMT_CFG80211_RX_AUTH; | |
2029 | out_err: | |
2030 | mutex_unlock(&sdata->local->sta_mtx); | |
2031 | /* ignore frame -- wait for timeout */ | |
2032 | return RX_MGMT_NONE; | |
2033 | } | |
2034 | ||
2035 | ||
77fdaa12 JB |
2036 | static enum rx_mgmt_action __must_check |
2037 | ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, | |
77fdaa12 | 2038 | struct ieee80211_mgmt *mgmt, size_t len) |
f0706e82 | 2039 | { |
46900298 | 2040 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
77fdaa12 | 2041 | const u8 *bssid = NULL; |
f0706e82 JB |
2042 | u16 reason_code; |
2043 | ||
66e67e41 JB |
2044 | lockdep_assert_held(&ifmgd->mtx); |
2045 | ||
f4ea83dd | 2046 | if (len < 24 + 2) |
77fdaa12 | 2047 | return RX_MGMT_NONE; |
f0706e82 | 2048 | |
66e67e41 | 2049 | if (!ifmgd->associated || |
b203ca39 | 2050 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
66e67e41 | 2051 | return RX_MGMT_NONE; |
77fdaa12 | 2052 | |
0c1ad2ca | 2053 | bssid = ifmgd->associated->bssid; |
f0706e82 JB |
2054 | |
2055 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
2056 | ||
bdcbd8e0 JB |
2057 | sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n", |
2058 | bssid, reason_code); | |
77fdaa12 | 2059 | |
37ad3888 JB |
2060 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
2061 | ||
77fdaa12 | 2062 | return RX_MGMT_CFG80211_DEAUTH; |
f0706e82 JB |
2063 | } |
2064 | ||
2065 | ||
77fdaa12 JB |
2066 | static enum rx_mgmt_action __must_check |
2067 | ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, | |
2068 | struct ieee80211_mgmt *mgmt, size_t len) | |
f0706e82 | 2069 | { |
46900298 | 2070 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
2071 | u16 reason_code; |
2072 | ||
66e67e41 | 2073 | lockdep_assert_held(&ifmgd->mtx); |
77fdaa12 | 2074 | |
66e67e41 | 2075 | if (len < 24 + 2) |
77fdaa12 JB |
2076 | return RX_MGMT_NONE; |
2077 | ||
66e67e41 | 2078 | if (!ifmgd->associated || |
b203ca39 | 2079 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
77fdaa12 | 2080 | return RX_MGMT_NONE; |
f0706e82 JB |
2081 | |
2082 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
2083 | ||
bdcbd8e0 JB |
2084 | sdata_info(sdata, "disassociated from %pM (Reason: %u)\n", |
2085 | mgmt->sa, reason_code); | |
f0706e82 | 2086 | |
37ad3888 JB |
2087 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
2088 | ||
77fdaa12 | 2089 | return RX_MGMT_CFG80211_DISASSOC; |
f0706e82 JB |
2090 | } |
2091 | ||
c74d084f CL |
2092 | static void ieee80211_get_rates(struct ieee80211_supported_band *sband, |
2093 | u8 *supp_rates, unsigned int supp_rates_len, | |
2094 | u32 *rates, u32 *basic_rates, | |
2095 | bool *have_higher_than_11mbit, | |
2096 | int *min_rate, int *min_rate_index) | |
2097 | { | |
2098 | int i, j; | |
2099 | ||
2100 | for (i = 0; i < supp_rates_len; i++) { | |
2101 | int rate = (supp_rates[i] & 0x7f) * 5; | |
2102 | bool is_basic = !!(supp_rates[i] & 0x80); | |
2103 | ||
2104 | if (rate > 110) | |
2105 | *have_higher_than_11mbit = true; | |
2106 | ||
2107 | /* | |
2108 | * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 | |
2109 | * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. | |
2110 | * | |
2111 | * Note: Even through the membership selector and the basic | |
2112 | * rate flag share the same bit, they are not exactly | |
2113 | * the same. | |
2114 | */ | |
2115 | if (!!(supp_rates[i] & 0x80) && | |
2116 | (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) | |
2117 | continue; | |
2118 | ||
2119 | for (j = 0; j < sband->n_bitrates; j++) { | |
2120 | if (sband->bitrates[j].bitrate == rate) { | |
2121 | *rates |= BIT(j); | |
2122 | if (is_basic) | |
2123 | *basic_rates |= BIT(j); | |
2124 | if (rate < *min_rate) { | |
2125 | *min_rate = rate; | |
2126 | *min_rate_index = j; | |
2127 | } | |
2128 | break; | |
2129 | } | |
2130 | } | |
2131 | } | |
2132 | } | |
f0706e82 | 2133 | |
66e67e41 JB |
2134 | static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, |
2135 | bool assoc) | |
2136 | { | |
2137 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; | |
2138 | ||
2139 | lockdep_assert_held(&sdata->u.mgd.mtx); | |
2140 | ||
66e67e41 JB |
2141 | if (!assoc) { |
2142 | sta_info_destroy_addr(sdata, assoc_data->bss->bssid); | |
2143 | ||
2144 | memset(sdata->u.mgd.bssid, 0, ETH_ALEN); | |
2145 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
028e8da0 | 2146 | sdata->u.mgd.flags = 0; |
55de908a | 2147 | ieee80211_vif_release_channel(sdata); |
66e67e41 JB |
2148 | } |
2149 | ||
2150 | kfree(assoc_data); | |
2151 | sdata->u.mgd.assoc_data = NULL; | |
2152 | } | |
2153 | ||
2154 | static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, | |
2155 | struct cfg80211_bss *cbss, | |
af6b6374 | 2156 | struct ieee80211_mgmt *mgmt, size_t len) |
f0706e82 | 2157 | { |
46900298 | 2158 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 2159 | struct ieee80211_local *local = sdata->local; |
8318d78a | 2160 | struct ieee80211_supported_band *sband; |
f0706e82 | 2161 | struct sta_info *sta; |
af6b6374 | 2162 | u8 *pos; |
af6b6374 | 2163 | u16 capab_info, aid; |
f0706e82 | 2164 | struct ieee802_11_elems elems; |
bda3933a | 2165 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ae5eb026 | 2166 | u32 changed = 0; |
c74d084f | 2167 | int err; |
f0706e82 | 2168 | |
af6b6374 | 2169 | /* AssocResp and ReassocResp have identical structure */ |
f0706e82 | 2170 | |
f0706e82 | 2171 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
af6b6374 | 2172 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
f0706e82 | 2173 | |
1dd84aa2 | 2174 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
bdcbd8e0 JB |
2175 | sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", |
2176 | aid); | |
1dd84aa2 JB |
2177 | aid &= ~(BIT(15) | BIT(14)); |
2178 | ||
05cb9108 JB |
2179 | ifmgd->broken_ap = false; |
2180 | ||
2181 | if (aid == 0 || aid > IEEE80211_MAX_AID) { | |
bdcbd8e0 JB |
2182 | sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", |
2183 | aid); | |
05cb9108 JB |
2184 | aid = 0; |
2185 | ifmgd->broken_ap = true; | |
2186 | } | |
2187 | ||
af6b6374 JB |
2188 | pos = mgmt->u.assoc_resp.variable; |
2189 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
2190 | ||
f0706e82 | 2191 | if (!elems.supp_rates) { |
bdcbd8e0 | 2192 | sdata_info(sdata, "no SuppRates element in AssocResp\n"); |
af6b6374 | 2193 | return false; |
f0706e82 JB |
2194 | } |
2195 | ||
46900298 | 2196 | ifmgd->aid = aid; |
f0706e82 | 2197 | |
2a33bee2 GE |
2198 | mutex_lock(&sdata->local->sta_mtx); |
2199 | /* | |
2200 | * station info was already allocated and inserted before | |
2201 | * the association and should be available to us | |
2202 | */ | |
7852e361 | 2203 | sta = sta_info_get(sdata, cbss->bssid); |
2a33bee2 GE |
2204 | if (WARN_ON(!sta)) { |
2205 | mutex_unlock(&sdata->local->sta_mtx); | |
af6b6374 | 2206 | return false; |
77fdaa12 | 2207 | } |
05e5e883 | 2208 | |
55de908a | 2209 | sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; |
f709fc69 | 2210 | |
a8243b72 | 2211 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
ef96a842 | 2212 | ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
d9fe60de | 2213 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 | 2214 | |
64f68e5d JB |
2215 | sta->supports_40mhz = |
2216 | sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
2217 | ||
818255ea MP |
2218 | if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
2219 | ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, | |
2220 | elems.vht_cap_elem, | |
2221 | &sta->sta.vht_cap); | |
2222 | ||
4b7679a5 | 2223 | rate_control_rate_init(sta); |
f0706e82 | 2224 | |
46900298 | 2225 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
c2c98fde | 2226 | set_sta_flag(sta, WLAN_STA_MFP); |
5394af4d | 2227 | |
ddf4ac53 | 2228 | if (elems.wmm_param) |
c2c98fde | 2229 | set_sta_flag(sta, WLAN_STA_WME); |
ddf4ac53 | 2230 | |
3e4d40fa | 2231 | err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); |
c8987876 JB |
2232 | if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) |
2233 | err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
2234 | if (err) { | |
bdcbd8e0 JB |
2235 | sdata_info(sdata, |
2236 | "failed to move station %pM to desired state\n", | |
2237 | sta->sta.addr); | |
c8987876 JB |
2238 | WARN_ON(__sta_info_destroy(sta)); |
2239 | mutex_unlock(&sdata->local->sta_mtx); | |
2240 | return false; | |
2241 | } | |
2242 | ||
7852e361 | 2243 | mutex_unlock(&sdata->local->sta_mtx); |
ddf4ac53 | 2244 | |
f2176d72 JO |
2245 | /* |
2246 | * Always handle WMM once after association regardless | |
2247 | * of the first value the AP uses. Setting -1 here has | |
2248 | * that effect because the AP values is an unsigned | |
2249 | * 4-bit value. | |
2250 | */ | |
2251 | ifmgd->wmm_last_param_set = -1; | |
2252 | ||
ddf4ac53 | 2253 | if (elems.wmm_param) |
4ced3f74 | 2254 | ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, |
60f8b39c | 2255 | elems.wmm_param_len); |
aa837e1d | 2256 | else |
3abead59 JB |
2257 | ieee80211_set_wmm_default(sdata, false); |
2258 | changed |= BSS_CHANGED_QOS; | |
f0706e82 | 2259 | |
074d46d1 | 2260 | if (elems.ht_operation && elems.wmm_param && |
a8243b72 | 2261 | !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
24398e39 JB |
2262 | changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation, |
2263 | cbss->bssid, false); | |
ae5eb026 | 2264 | |
60f8b39c JB |
2265 | /* set AID and assoc capability, |
2266 | * ieee80211_set_associated() will tell the driver */ | |
2267 | bss_conf->aid = aid; | |
2268 | bss_conf->assoc_capability = capab_info; | |
0c1ad2ca | 2269 | ieee80211_set_associated(sdata, cbss, changed); |
f0706e82 | 2270 | |
d524215f FF |
2271 | /* |
2272 | * If we're using 4-addr mode, let the AP know that we're | |
2273 | * doing so, so that it can create the STA VLAN on its side | |
2274 | */ | |
2275 | if (ifmgd->use_4addr) | |
2276 | ieee80211_send_4addr_nullfunc(local, sdata); | |
2277 | ||
15b7b062 | 2278 | /* |
b291ba11 JB |
2279 | * Start timer to probe the connection to the AP now. |
2280 | * Also start the timer that will detect beacon loss. | |
15b7b062 | 2281 | */ |
b291ba11 | 2282 | ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); |
d3a910a8 | 2283 | ieee80211_sta_reset_beacon_monitor(sdata); |
15b7b062 | 2284 | |
af6b6374 | 2285 | return true; |
f0706e82 JB |
2286 | } |
2287 | ||
66e67e41 JB |
2288 | static enum rx_mgmt_action __must_check |
2289 | ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, | |
2290 | struct ieee80211_mgmt *mgmt, size_t len, | |
2291 | struct cfg80211_bss **bss) | |
2292 | { | |
2293 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2294 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; | |
2295 | u16 capab_info, status_code, aid; | |
2296 | struct ieee802_11_elems elems; | |
2297 | u8 *pos; | |
2298 | bool reassoc; | |
2299 | ||
2300 | lockdep_assert_held(&ifmgd->mtx); | |
2301 | ||
2302 | if (!assoc_data) | |
2303 | return RX_MGMT_NONE; | |
b203ca39 | 2304 | if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) |
66e67e41 JB |
2305 | return RX_MGMT_NONE; |
2306 | ||
2307 | /* | |
2308 | * AssocResp and ReassocResp have identical structure, so process both | |
2309 | * of them in this function. | |
2310 | */ | |
2311 | ||
2312 | if (len < 24 + 6) | |
2313 | return RX_MGMT_NONE; | |
2314 | ||
2315 | reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); | |
2316 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
2317 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
2318 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
2319 | ||
bdcbd8e0 JB |
2320 | sdata_info(sdata, |
2321 | "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", | |
2322 | reassoc ? "Rea" : "A", mgmt->sa, | |
2323 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); | |
66e67e41 JB |
2324 | |
2325 | pos = mgmt->u.assoc_resp.variable; | |
2326 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
2327 | ||
2328 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
2329 | elems.timeout_int && elems.timeout_int_len == 5 && | |
2330 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
2331 | u32 tu, ms; | |
2332 | tu = get_unaligned_le32(elems.timeout_int + 1); | |
2333 | ms = tu * 1024 / 1000; | |
bdcbd8e0 JB |
2334 | sdata_info(sdata, |
2335 | "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", | |
2336 | mgmt->sa, tu, ms); | |
66e67e41 | 2337 | assoc_data->timeout = jiffies + msecs_to_jiffies(ms); |
89afe614 | 2338 | assoc_data->timeout_started = true; |
66e67e41 JB |
2339 | if (ms > IEEE80211_ASSOC_TIMEOUT) |
2340 | run_again(ifmgd, assoc_data->timeout); | |
2341 | return RX_MGMT_NONE; | |
2342 | } | |
2343 | ||
2344 | *bss = assoc_data->bss; | |
2345 | ||
2346 | if (status_code != WLAN_STATUS_SUCCESS) { | |
bdcbd8e0 JB |
2347 | sdata_info(sdata, "%pM denied association (code=%d)\n", |
2348 | mgmt->sa, status_code); | |
66e67e41 JB |
2349 | ieee80211_destroy_assoc_data(sdata, false); |
2350 | } else { | |
66e67e41 JB |
2351 | if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) { |
2352 | /* oops -- internal error -- send timeout for now */ | |
10a9109f | 2353 | ieee80211_destroy_assoc_data(sdata, false); |
5b112d3d | 2354 | cfg80211_put_bss(sdata->local->hw.wiphy, *bss); |
66e67e41 JB |
2355 | return RX_MGMT_CFG80211_ASSOC_TIMEOUT; |
2356 | } | |
635d999f | 2357 | sdata_info(sdata, "associated\n"); |
79ebfb85 JB |
2358 | |
2359 | /* | |
2360 | * destroy assoc_data afterwards, as otherwise an idle | |
2361 | * recalc after assoc_data is NULL but before associated | |
2362 | * is set can cause the interface to go idle | |
2363 | */ | |
2364 | ieee80211_destroy_assoc_data(sdata, true); | |
66e67e41 JB |
2365 | } |
2366 | ||
2367 | return RX_MGMT_CFG80211_RX_ASSOC; | |
2368 | } | |
8e3c1b77 | 2369 | |
98c8fccf | 2370 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
8e3c1b77 | 2371 | struct ieee80211_mgmt *mgmt, size_t len, |
98c8fccf | 2372 | struct ieee80211_rx_status *rx_status, |
d45c4172 | 2373 | struct ieee802_11_elems *elems) |
98c8fccf JB |
2374 | { |
2375 | struct ieee80211_local *local = sdata->local; | |
2376 | int freq; | |
c2b13452 | 2377 | struct ieee80211_bss *bss; |
98c8fccf | 2378 | struct ieee80211_channel *channel; |
56007a02 JB |
2379 | bool need_ps = false; |
2380 | ||
826262c3 JB |
2381 | if ((sdata->u.mgd.associated && |
2382 | ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) || | |
2383 | (sdata->u.mgd.assoc_data && | |
2384 | ether_addr_equal(mgmt->bssid, | |
2385 | sdata->u.mgd.assoc_data->bss->bssid))) { | |
56007a02 | 2386 | /* not previously set so we may need to recalc */ |
826262c3 JB |
2387 | need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period; |
2388 | ||
2389 | if (elems->tim && !elems->parse_error) { | |
2390 | struct ieee80211_tim_ie *tim_ie = elems->tim; | |
2391 | sdata->u.mgd.dtim_period = tim_ie->dtim_period; | |
2392 | } | |
56007a02 | 2393 | } |
98c8fccf JB |
2394 | |
2395 | if (elems->ds_params && elems->ds_params_len == 1) | |
59eb21a6 BR |
2396 | freq = ieee80211_channel_to_frequency(elems->ds_params[0], |
2397 | rx_status->band); | |
98c8fccf JB |
2398 | else |
2399 | freq = rx_status->freq; | |
2400 | ||
2401 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
2402 | ||
2403 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
2404 | return; | |
2405 | ||
98c8fccf | 2406 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
d45c4172 | 2407 | channel); |
77fdaa12 JB |
2408 | if (bss) |
2409 | ieee80211_rx_bss_put(local, bss); | |
2410 | ||
2411 | if (!sdata->u.mgd.associated) | |
98c8fccf JB |
2412 | return; |
2413 | ||
56007a02 JB |
2414 | if (need_ps) { |
2415 | mutex_lock(&local->iflist_mtx); | |
2416 | ieee80211_recalc_ps(local, -1); | |
2417 | mutex_unlock(&local->iflist_mtx); | |
2418 | } | |
2419 | ||
5bc1420b JB |
2420 | if (elems->ch_switch_ie && |
2421 | memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0) | |
2422 | ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie, | |
5ce6e438 | 2423 | bss, rx_status->mactime); |
f0706e82 JB |
2424 | } |
2425 | ||
2426 | ||
f698d856 | 2427 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
af6b6374 | 2428 | struct sk_buff *skb) |
f0706e82 | 2429 | { |
af6b6374 | 2430 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
15b7b062 | 2431 | struct ieee80211_if_managed *ifmgd; |
af6b6374 JB |
2432 | struct ieee80211_rx_status *rx_status = (void *) skb->cb; |
2433 | size_t baselen, len = skb->len; | |
ae6a44e3 EK |
2434 | struct ieee802_11_elems elems; |
2435 | ||
15b7b062 KV |
2436 | ifmgd = &sdata->u.mgd; |
2437 | ||
77fdaa12 JB |
2438 | ASSERT_MGD_MTX(ifmgd); |
2439 | ||
b203ca39 | 2440 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) |
8e7cdbb6 TW |
2441 | return; /* ignore ProbeResp to foreign address */ |
2442 | ||
ae6a44e3 EK |
2443 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
2444 | if (baselen > len) | |
2445 | return; | |
2446 | ||
2447 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
2448 | &elems); | |
2449 | ||
d45c4172 | 2450 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
9859b81e | 2451 | |
77fdaa12 | 2452 | if (ifmgd->associated && |
b203ca39 | 2453 | ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
4e5ff376 | 2454 | ieee80211_reset_ap_probe(sdata); |
66e67e41 JB |
2455 | |
2456 | if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies && | |
b203ca39 | 2457 | ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) { |
66e67e41 | 2458 | /* got probe response, continue with auth */ |
bdcbd8e0 | 2459 | sdata_info(sdata, "direct probe responded\n"); |
66e67e41 JB |
2460 | ifmgd->auth_data->tries = 0; |
2461 | ifmgd->auth_data->timeout = jiffies; | |
89afe614 | 2462 | ifmgd->auth_data->timeout_started = true; |
66e67e41 JB |
2463 | run_again(ifmgd, ifmgd->auth_data->timeout); |
2464 | } | |
f0706e82 JB |
2465 | } |
2466 | ||
d91f36db JB |
2467 | /* |
2468 | * This is the canonical list of information elements we care about, | |
2469 | * the filter code also gives us all changes to the Microsoft OUI | |
2470 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
2471 | * | |
2472 | * We implement beacon filtering in software since that means we can | |
2473 | * avoid processing the frame here and in cfg80211, and userspace | |
2474 | * will not be able to tell whether the hardware supports it or not. | |
2475 | * | |
2476 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
2477 | * add items it requires. It also needs to be able to tell us to | |
2478 | * look out for other vendor IEs. | |
2479 | */ | |
2480 | static const u64 care_about_ies = | |
1d4df3a5 JB |
2481 | (1ULL << WLAN_EID_COUNTRY) | |
2482 | (1ULL << WLAN_EID_ERP_INFO) | | |
2483 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
2484 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
2485 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
074d46d1 | 2486 | (1ULL << WLAN_EID_HT_OPERATION); |
d91f36db | 2487 | |
f698d856 | 2488 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2489 | struct ieee80211_mgmt *mgmt, |
2490 | size_t len, | |
2491 | struct ieee80211_rx_status *rx_status) | |
2492 | { | |
d91f36db | 2493 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
17e4ec14 | 2494 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 JB |
2495 | size_t baselen; |
2496 | struct ieee802_11_elems elems; | |
f698d856 | 2497 | struct ieee80211_local *local = sdata->local; |
55de908a JB |
2498 | struct ieee80211_chanctx_conf *chanctx_conf; |
2499 | struct ieee80211_channel *chan; | |
471b3efd | 2500 | u32 changed = 0; |
f87ad637 | 2501 | bool erp_valid; |
7a5158ef | 2502 | u8 erp_value = 0; |
d91f36db | 2503 | u32 ncrc; |
77fdaa12 JB |
2504 | u8 *bssid; |
2505 | ||
66e67e41 | 2506 | lockdep_assert_held(&ifmgd->mtx); |
f0706e82 | 2507 | |
ae6a44e3 EK |
2508 | /* Process beacon from the current BSS */ |
2509 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
2510 | if (baselen > len) | |
2511 | return; | |
2512 | ||
55de908a JB |
2513 | rcu_read_lock(); |
2514 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
2515 | if (!chanctx_conf) { | |
2516 | rcu_read_unlock(); | |
f0706e82 | 2517 | return; |
55de908a JB |
2518 | } |
2519 | ||
4bf88530 | 2520 | if (rx_status->freq != chanctx_conf->def.chan->center_freq) { |
55de908a JB |
2521 | rcu_read_unlock(); |
2522 | return; | |
2523 | } | |
4bf88530 | 2524 | chan = chanctx_conf->def.chan; |
55de908a | 2525 | rcu_read_unlock(); |
f0706e82 | 2526 | |
c65dd147 | 2527 | if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && |
b203ca39 | 2528 | ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { |
66e67e41 JB |
2529 | ieee802_11_parse_elems(mgmt->u.beacon.variable, |
2530 | len - baselen, &elems); | |
77fdaa12 | 2531 | |
d45c4172 | 2532 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
66e67e41 | 2533 | ifmgd->assoc_data->have_beacon = true; |
c65dd147 | 2534 | ifmgd->assoc_data->need_beacon = false; |
ef429dad JB |
2535 | if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { |
2536 | sdata->vif.bss_conf.sync_tsf = | |
2537 | le64_to_cpu(mgmt->u.beacon.timestamp); | |
2538 | sdata->vif.bss_conf.sync_device_ts = | |
2539 | rx_status->device_timestamp; | |
2540 | if (elems.tim) | |
2541 | sdata->vif.bss_conf.sync_dtim_count = | |
2542 | elems.tim->dtim_count; | |
2543 | else | |
2544 | sdata->vif.bss_conf.sync_dtim_count = 0; | |
2545 | } | |
66e67e41 JB |
2546 | /* continue assoc process */ |
2547 | ifmgd->assoc_data->timeout = jiffies; | |
89afe614 | 2548 | ifmgd->assoc_data->timeout_started = true; |
66e67e41 JB |
2549 | run_again(ifmgd, ifmgd->assoc_data->timeout); |
2550 | return; | |
2551 | } | |
77fdaa12 | 2552 | |
66e67e41 | 2553 | if (!ifmgd->associated || |
b203ca39 | 2554 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
f0706e82 | 2555 | return; |
66e67e41 | 2556 | bssid = ifmgd->associated->bssid; |
f0706e82 | 2557 | |
17e4ec14 JM |
2558 | /* Track average RSSI from the Beacon frames of the current AP */ |
2559 | ifmgd->last_beacon_signal = rx_status->signal; | |
2560 | if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { | |
2561 | ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; | |
3ba06c6f | 2562 | ifmgd->ave_beacon_signal = rx_status->signal * 16; |
17e4ec14 | 2563 | ifmgd->last_cqm_event_signal = 0; |
391a200a | 2564 | ifmgd->count_beacon_signal = 1; |
615f7b9b | 2565 | ifmgd->last_ave_beacon_signal = 0; |
17e4ec14 JM |
2566 | } else { |
2567 | ifmgd->ave_beacon_signal = | |
2568 | (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + | |
2569 | (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * | |
2570 | ifmgd->ave_beacon_signal) / 16; | |
391a200a | 2571 | ifmgd->count_beacon_signal++; |
17e4ec14 | 2572 | } |
615f7b9b MV |
2573 | |
2574 | if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && | |
2575 | ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { | |
2576 | int sig = ifmgd->ave_beacon_signal; | |
2577 | int last_sig = ifmgd->last_ave_beacon_signal; | |
2578 | ||
2579 | /* | |
2580 | * if signal crosses either of the boundaries, invoke callback | |
2581 | * with appropriate parameters | |
2582 | */ | |
2583 | if (sig > ifmgd->rssi_max_thold && | |
2584 | (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { | |
2585 | ifmgd->last_ave_beacon_signal = sig; | |
887da917 | 2586 | drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH); |
615f7b9b MV |
2587 | } else if (sig < ifmgd->rssi_min_thold && |
2588 | (last_sig >= ifmgd->rssi_max_thold || | |
2589 | last_sig == 0)) { | |
2590 | ifmgd->last_ave_beacon_signal = sig; | |
887da917 | 2591 | drv_rssi_callback(local, sdata, RSSI_EVENT_LOW); |
615f7b9b MV |
2592 | } |
2593 | } | |
2594 | ||
17e4ec14 | 2595 | if (bss_conf->cqm_rssi_thold && |
391a200a | 2596 | ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && |
ea086359 | 2597 | !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { |
17e4ec14 JM |
2598 | int sig = ifmgd->ave_beacon_signal / 16; |
2599 | int last_event = ifmgd->last_cqm_event_signal; | |
2600 | int thold = bss_conf->cqm_rssi_thold; | |
2601 | int hyst = bss_conf->cqm_rssi_hyst; | |
2602 | if (sig < thold && | |
2603 | (last_event == 0 || sig < last_event - hyst)) { | |
2604 | ifmgd->last_cqm_event_signal = sig; | |
2605 | ieee80211_cqm_rssi_notify( | |
2606 | &sdata->vif, | |
2607 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, | |
2608 | GFP_KERNEL); | |
2609 | } else if (sig > thold && | |
2610 | (last_event == 0 || sig > last_event + hyst)) { | |
2611 | ifmgd->last_cqm_event_signal = sig; | |
2612 | ieee80211_cqm_rssi_notify( | |
2613 | &sdata->vif, | |
2614 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, | |
2615 | GFP_KERNEL); | |
2616 | } | |
2617 | } | |
2618 | ||
b291ba11 | 2619 | if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { |
bdcbd8e0 | 2620 | mlme_dbg_ratelimited(sdata, |
112c31f0 | 2621 | "cancelling AP probe due to a received beacon\n"); |
925e64c3 | 2622 | mutex_lock(&local->mtx); |
b291ba11 | 2623 | ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
925e64c3 SG |
2624 | ieee80211_run_deferred_scan(local); |
2625 | mutex_unlock(&local->mtx); | |
2626 | ||
4e751843 JB |
2627 | mutex_lock(&local->iflist_mtx); |
2628 | ieee80211_recalc_ps(local, -1); | |
2629 | mutex_unlock(&local->iflist_mtx); | |
92778180 JM |
2630 | } |
2631 | ||
b291ba11 JB |
2632 | /* |
2633 | * Push the beacon loss detection into the future since | |
2634 | * we are processing a beacon from the AP just now. | |
2635 | */ | |
d3a910a8 | 2636 | ieee80211_sta_reset_beacon_monitor(sdata); |
b291ba11 | 2637 | |
d91f36db JB |
2638 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
2639 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
2640 | len - baselen, &elems, | |
2641 | care_about_ies, ncrc); | |
2642 | ||
25c9c875 | 2643 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
f87ad637 RR |
2644 | bool directed_tim = ieee80211_check_tim(elems.tim, |
2645 | elems.tim_len, | |
2646 | ifmgd->aid); | |
1fb3606b | 2647 | if (directed_tim) { |
572e0012 | 2648 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
70b12f26 RW |
2649 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
2650 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
2651 | ieee80211_hw_config(local, | |
2652 | IEEE80211_CONF_CHANGE_PS); | |
2653 | } | |
572e0012 | 2654 | ieee80211_send_nullfunc(local, sdata, 0); |
6f0756a3 | 2655 | } else if (!local->pspolling && sdata->u.mgd.powersave) { |
572e0012 KV |
2656 | local->pspolling = true; |
2657 | ||
2658 | /* | |
2659 | * Here is assumed that the driver will be | |
2660 | * able to send ps-poll frame and receive a | |
2661 | * response even though power save mode is | |
2662 | * enabled, but some drivers might require | |
2663 | * to disable power save here. This needs | |
2664 | * to be investigated. | |
2665 | */ | |
2666 | ieee80211_send_pspoll(local, sdata); | |
2667 | } | |
a97b77b9 VN |
2668 | } |
2669 | } | |
7a5158ef | 2670 | |
488dd7b5 JB |
2671 | if (sdata->vif.p2p) { |
2672 | u8 noa[2]; | |
2673 | int ret; | |
2674 | ||
2675 | ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, | |
2676 | len - baselen, | |
2677 | IEEE80211_P2P_ATTR_ABSENCE_NOTICE, | |
2678 | noa, sizeof(noa)); | |
2679 | if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) { | |
2680 | bss_conf->p2p_oppps = noa[1] & 0x80; | |
2681 | bss_conf->p2p_ctwindow = noa[1] & 0x7f; | |
2682 | changed |= BSS_CHANGED_P2P_PS; | |
2683 | sdata->u.mgd.p2p_noa_index = noa[0]; | |
2684 | /* | |
2685 | * make sure we update all information, the CRC | |
2686 | * mechanism doesn't look at P2P attributes. | |
2687 | */ | |
2688 | ifmgd->beacon_crc_valid = false; | |
2689 | } | |
2690 | } | |
2691 | ||
d8ec4433 | 2692 | if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) |
30196673 JM |
2693 | return; |
2694 | ifmgd->beacon_crc = ncrc; | |
d8ec4433 | 2695 | ifmgd->beacon_crc_valid = true; |
30196673 | 2696 | |
d45c4172 | 2697 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
7d25745d JB |
2698 | |
2699 | if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, | |
2700 | elems.wmm_param_len)) | |
2701 | changed |= BSS_CHANGED_QOS; | |
2702 | ||
c65dd147 EG |
2703 | /* |
2704 | * If we haven't had a beacon before, tell the driver about the | |
ef429dad | 2705 | * DTIM period (and beacon timing if desired) now. |
c65dd147 EG |
2706 | */ |
2707 | if (!bss_conf->dtim_period) { | |
2708 | /* a few bogus AP send dtim_period = 0 or no TIM IE */ | |
2709 | if (elems.tim) | |
2710 | bss_conf->dtim_period = elems.tim->dtim_period ?: 1; | |
2711 | else | |
2712 | bss_conf->dtim_period = 1; | |
ef429dad JB |
2713 | |
2714 | if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { | |
2715 | sdata->vif.bss_conf.sync_tsf = | |
2716 | le64_to_cpu(mgmt->u.beacon.timestamp); | |
2717 | sdata->vif.bss_conf.sync_device_ts = | |
2718 | rx_status->device_timestamp; | |
2719 | if (elems.tim) | |
2720 | sdata->vif.bss_conf.sync_dtim_count = | |
2721 | elems.tim->dtim_count; | |
2722 | else | |
2723 | sdata->vif.bss_conf.sync_dtim_count = 0; | |
2724 | } | |
2725 | ||
c65dd147 EG |
2726 | changed |= BSS_CHANGED_DTIM_PERIOD; |
2727 | } | |
2728 | ||
7a5158ef JB |
2729 | if (elems.erp_info && elems.erp_info_len >= 1) { |
2730 | erp_valid = true; | |
2731 | erp_value = elems.erp_info[0]; | |
2732 | } else { | |
2733 | erp_valid = false; | |
50c4afb9 | 2734 | } |
7a5158ef JB |
2735 | changed |= ieee80211_handle_bss_capability(sdata, |
2736 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
2737 | erp_valid, erp_value); | |
f0706e82 | 2738 | |
d3c990fb | 2739 | |
074d46d1 | 2740 | if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param && |
a8243b72 | 2741 | !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
24398e39 JB |
2742 | changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation, |
2743 | bssid, true); | |
d3c990fb | 2744 | |
04b7b2ff JB |
2745 | if (elems.country_elem && elems.pwr_constr_elem && |
2746 | mgmt->u.probe_resp.capab_info & | |
2747 | cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) | |
1ea6f9c0 JB |
2748 | changed |= ieee80211_handle_pwr_constr(sdata, chan, |
2749 | elems.country_elem, | |
2750 | elems.country_elem_len, | |
2751 | elems.pwr_constr_elem); | |
3f2355cb | 2752 | |
471b3efd | 2753 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
2754 | } |
2755 | ||
1fa57d01 JB |
2756 | void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
2757 | struct sk_buff *skb) | |
f0706e82 | 2758 | { |
77fdaa12 | 2759 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 2760 | struct ieee80211_rx_status *rx_status; |
f0706e82 | 2761 | struct ieee80211_mgmt *mgmt; |
66e67e41 | 2762 | struct cfg80211_bss *bss = NULL; |
77fdaa12 | 2763 | enum rx_mgmt_action rma = RX_MGMT_NONE; |
f0706e82 JB |
2764 | u16 fc; |
2765 | ||
f0706e82 JB |
2766 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
2767 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2768 | fc = le16_to_cpu(mgmt->frame_control); | |
2769 | ||
77fdaa12 JB |
2770 | mutex_lock(&ifmgd->mtx); |
2771 | ||
66e67e41 JB |
2772 | switch (fc & IEEE80211_FCTL_STYPE) { |
2773 | case IEEE80211_STYPE_BEACON: | |
2774 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); | |
2775 | break; | |
2776 | case IEEE80211_STYPE_PROBE_RESP: | |
2777 | ieee80211_rx_mgmt_probe_resp(sdata, skb); | |
2778 | break; | |
2779 | case IEEE80211_STYPE_AUTH: | |
2780 | rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
2781 | break; | |
2782 | case IEEE80211_STYPE_DEAUTH: | |
2783 | rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
2784 | break; | |
2785 | case IEEE80211_STYPE_DISASSOC: | |
2786 | rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
2787 | break; | |
2788 | case IEEE80211_STYPE_ASSOC_RESP: | |
2789 | case IEEE80211_STYPE_REASSOC_RESP: | |
2790 | rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss); | |
2791 | break; | |
2792 | case IEEE80211_STYPE_ACTION: | |
2793 | switch (mgmt->u.action.category) { | |
2794 | case WLAN_CATEGORY_SPECTRUM_MGMT: | |
2795 | ieee80211_sta_process_chanswitch(sdata, | |
2796 | &mgmt->u.action.u.chan_switch.sw_elem, | |
2797 | (void *)ifmgd->associated->priv, | |
2798 | rx_status->mactime); | |
77fdaa12 | 2799 | break; |
77fdaa12 | 2800 | } |
77fdaa12 | 2801 | } |
77fdaa12 JB |
2802 | mutex_unlock(&ifmgd->mtx); |
2803 | ||
66e67e41 JB |
2804 | switch (rma) { |
2805 | case RX_MGMT_NONE: | |
2806 | /* no action */ | |
2807 | break; | |
2808 | case RX_MGMT_CFG80211_DEAUTH: | |
ce470613 | 2809 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
66e67e41 JB |
2810 | break; |
2811 | case RX_MGMT_CFG80211_DISASSOC: | |
2812 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); | |
2813 | break; | |
2814 | case RX_MGMT_CFG80211_RX_AUTH: | |
2815 | cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len); | |
2816 | break; | |
2817 | case RX_MGMT_CFG80211_RX_ASSOC: | |
2818 | cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len); | |
2819 | break; | |
2820 | case RX_MGMT_CFG80211_ASSOC_TIMEOUT: | |
2821 | cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid); | |
2822 | break; | |
2823 | default: | |
2824 | WARN(1, "unexpected: %d", rma); | |
b054b747 | 2825 | } |
f0706e82 JB |
2826 | } |
2827 | ||
9c6bd790 | 2828 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 2829 | { |
60f8b39c JB |
2830 | struct ieee80211_sub_if_data *sdata = |
2831 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 2832 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2833 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2834 | |
5bb644a0 JB |
2835 | if (local->quiescing) { |
2836 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
2837 | return; | |
2838 | } | |
2839 | ||
64592c8f | 2840 | ieee80211_queue_work(&local->hw, &sdata->work); |
f0706e82 JB |
2841 | } |
2842 | ||
04ac3c0e | 2843 | static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, |
6b684db1 | 2844 | u8 *bssid, u8 reason, bool tx) |
04ac3c0e | 2845 | { |
04ac3c0e | 2846 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
6ae16775 | 2847 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
04ac3c0e | 2848 | |
37ad3888 | 2849 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, |
6b684db1 | 2850 | tx, frame_buf); |
04ac3c0e | 2851 | mutex_unlock(&ifmgd->mtx); |
37ad3888 | 2852 | |
04ac3c0e FF |
2853 | /* |
2854 | * must be outside lock due to cfg80211, | |
2855 | * but that's not a problem. | |
2856 | */ | |
6ae16775 | 2857 | cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN); |
fcac4fb0 | 2858 | |
04ac3c0e FF |
2859 | mutex_lock(&ifmgd->mtx); |
2860 | } | |
2861 | ||
66e67e41 JB |
2862 | static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata) |
2863 | { | |
2864 | struct ieee80211_local *local = sdata->local; | |
2865 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2866 | struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; | |
1672c0e3 | 2867 | u32 tx_flags = 0; |
66e67e41 JB |
2868 | |
2869 | lockdep_assert_held(&ifmgd->mtx); | |
2870 | ||
2871 | if (WARN_ON_ONCE(!auth_data)) | |
2872 | return -EINVAL; | |
2873 | ||
1672c0e3 JB |
2874 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
2875 | tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | | |
2876 | IEEE80211_TX_INTFL_MLME_CONN_TX; | |
2877 | ||
66e67e41 JB |
2878 | auth_data->tries++; |
2879 | ||
2880 | if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { | |
bdcbd8e0 JB |
2881 | sdata_info(sdata, "authentication with %pM timed out\n", |
2882 | auth_data->bss->bssid); | |
66e67e41 JB |
2883 | |
2884 | /* | |
2885 | * Most likely AP is not in the range so remove the | |
2886 | * bss struct for that AP. | |
2887 | */ | |
2888 | cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); | |
2889 | ||
2890 | return -ETIMEDOUT; | |
2891 | } | |
2892 | ||
a1845fc7 JB |
2893 | drv_mgd_prepare_tx(local, sdata); |
2894 | ||
66e67e41 | 2895 | if (auth_data->bss->proberesp_ies) { |
6b8ece3a JM |
2896 | u16 trans = 1; |
2897 | u16 status = 0; | |
2898 | ||
bdcbd8e0 JB |
2899 | sdata_info(sdata, "send auth to %pM (try %d/%d)\n", |
2900 | auth_data->bss->bssid, auth_data->tries, | |
2901 | IEEE80211_AUTH_MAX_TRIES); | |
66e67e41 JB |
2902 | |
2903 | auth_data->expected_transaction = 2; | |
6b8ece3a JM |
2904 | |
2905 | if (auth_data->algorithm == WLAN_AUTH_SAE) { | |
2906 | trans = auth_data->sae_trans; | |
2907 | status = auth_data->sae_status; | |
2908 | auth_data->expected_transaction = trans; | |
2909 | } | |
2910 | ||
2911 | ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, | |
2912 | auth_data->data, auth_data->data_len, | |
66e67e41 | 2913 | auth_data->bss->bssid, |
1672c0e3 JB |
2914 | auth_data->bss->bssid, NULL, 0, 0, |
2915 | tx_flags); | |
66e67e41 JB |
2916 | } else { |
2917 | const u8 *ssidie; | |
2918 | ||
bdcbd8e0 JB |
2919 | sdata_info(sdata, "direct probe to %pM (try %d/%i)\n", |
2920 | auth_data->bss->bssid, auth_data->tries, | |
2921 | IEEE80211_AUTH_MAX_TRIES); | |
66e67e41 | 2922 | |
9caf0364 | 2923 | rcu_read_lock(); |
66e67e41 | 2924 | ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID); |
9caf0364 JB |
2925 | if (!ssidie) { |
2926 | rcu_read_unlock(); | |
66e67e41 | 2927 | return -EINVAL; |
9caf0364 | 2928 | } |
66e67e41 JB |
2929 | /* |
2930 | * Direct probe is sent to broadcast address as some APs | |
2931 | * will not answer to direct packet in unassociated state. | |
2932 | */ | |
2933 | ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1], | |
1672c0e3 | 2934 | NULL, 0, (u32) -1, true, tx_flags, |
55de908a | 2935 | auth_data->bss->channel, false); |
9caf0364 | 2936 | rcu_read_unlock(); |
66e67e41 JB |
2937 | } |
2938 | ||
1672c0e3 JB |
2939 | if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) { |
2940 | auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; | |
89afe614 | 2941 | ifmgd->auth_data->timeout_started = true; |
1672c0e3 | 2942 | run_again(ifmgd, auth_data->timeout); |
89afe614 JB |
2943 | } else { |
2944 | auth_data->timeout_started = false; | |
1672c0e3 | 2945 | } |
66e67e41 JB |
2946 | |
2947 | return 0; | |
2948 | } | |
2949 | ||
2950 | static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) | |
2951 | { | |
2952 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; | |
2953 | struct ieee80211_local *local = sdata->local; | |
2954 | ||
2955 | lockdep_assert_held(&sdata->u.mgd.mtx); | |
2956 | ||
66e67e41 JB |
2957 | assoc_data->tries++; |
2958 | if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { | |
bdcbd8e0 JB |
2959 | sdata_info(sdata, "association with %pM timed out\n", |
2960 | assoc_data->bss->bssid); | |
66e67e41 JB |
2961 | |
2962 | /* | |
2963 | * Most likely AP is not in the range so remove the | |
2964 | * bss struct for that AP. | |
2965 | */ | |
2966 | cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); | |
2967 | ||
2968 | return -ETIMEDOUT; | |
2969 | } | |
2970 | ||
bdcbd8e0 JB |
2971 | sdata_info(sdata, "associate with %pM (try %d/%d)\n", |
2972 | assoc_data->bss->bssid, assoc_data->tries, | |
2973 | IEEE80211_ASSOC_MAX_TRIES); | |
66e67e41 JB |
2974 | ieee80211_send_assoc(sdata); |
2975 | ||
1672c0e3 JB |
2976 | if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) { |
2977 | assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; | |
89afe614 | 2978 | assoc_data->timeout_started = true; |
1672c0e3 | 2979 | run_again(&sdata->u.mgd, assoc_data->timeout); |
89afe614 JB |
2980 | } else { |
2981 | assoc_data->timeout_started = false; | |
1672c0e3 | 2982 | } |
66e67e41 JB |
2983 | |
2984 | return 0; | |
2985 | } | |
2986 | ||
1672c0e3 JB |
2987 | void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, |
2988 | __le16 fc, bool acked) | |
2989 | { | |
2990 | struct ieee80211_local *local = sdata->local; | |
2991 | ||
2992 | sdata->u.mgd.status_fc = fc; | |
2993 | sdata->u.mgd.status_acked = acked; | |
2994 | sdata->u.mgd.status_received = true; | |
2995 | ||
2996 | ieee80211_queue_work(&local->hw, &sdata->work); | |
2997 | } | |
2998 | ||
1fa57d01 | 2999 | void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) |
9c6bd790 | 3000 | { |
9c6bd790 | 3001 | struct ieee80211_local *local = sdata->local; |
1fa57d01 | 3002 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 3003 | |
77fdaa12 JB |
3004 | mutex_lock(&ifmgd->mtx); |
3005 | ||
1672c0e3 JB |
3006 | if (ifmgd->status_received) { |
3007 | __le16 fc = ifmgd->status_fc; | |
3008 | bool status_acked = ifmgd->status_acked; | |
3009 | ||
3010 | ifmgd->status_received = false; | |
3011 | if (ifmgd->auth_data && | |
3012 | (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) { | |
3013 | if (status_acked) { | |
3014 | ifmgd->auth_data->timeout = | |
3015 | jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; | |
3016 | run_again(ifmgd, ifmgd->auth_data->timeout); | |
3017 | } else { | |
3018 | ifmgd->auth_data->timeout = jiffies - 1; | |
3019 | } | |
89afe614 | 3020 | ifmgd->auth_data->timeout_started = true; |
1672c0e3 JB |
3021 | } else if (ifmgd->assoc_data && |
3022 | (ieee80211_is_assoc_req(fc) || | |
3023 | ieee80211_is_reassoc_req(fc))) { | |
3024 | if (status_acked) { | |
3025 | ifmgd->assoc_data->timeout = | |
3026 | jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; | |
3027 | run_again(ifmgd, ifmgd->assoc_data->timeout); | |
3028 | } else { | |
3029 | ifmgd->assoc_data->timeout = jiffies - 1; | |
3030 | } | |
89afe614 | 3031 | ifmgd->assoc_data->timeout_started = true; |
1672c0e3 JB |
3032 | } |
3033 | } | |
3034 | ||
89afe614 | 3035 | if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && |
66e67e41 JB |
3036 | time_after(jiffies, ifmgd->auth_data->timeout)) { |
3037 | if (ifmgd->auth_data->done) { | |
3038 | /* | |
3039 | * ok ... we waited for assoc but userspace didn't, | |
3040 | * so let's just kill the auth data | |
3041 | */ | |
3042 | ieee80211_destroy_auth_data(sdata, false); | |
3043 | } else if (ieee80211_probe_auth(sdata)) { | |
3044 | u8 bssid[ETH_ALEN]; | |
3045 | ||
3046 | memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); | |
3047 | ||
3048 | ieee80211_destroy_auth_data(sdata, false); | |
3049 | ||
3050 | mutex_unlock(&ifmgd->mtx); | |
3051 | cfg80211_send_auth_timeout(sdata->dev, bssid); | |
3052 | mutex_lock(&ifmgd->mtx); | |
3053 | } | |
89afe614 | 3054 | } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) |
66e67e41 JB |
3055 | run_again(ifmgd, ifmgd->auth_data->timeout); |
3056 | ||
89afe614 | 3057 | if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && |
66e67e41 | 3058 | time_after(jiffies, ifmgd->assoc_data->timeout)) { |
c65dd147 EG |
3059 | if ((ifmgd->assoc_data->need_beacon && |
3060 | !ifmgd->assoc_data->have_beacon) || | |
66e67e41 JB |
3061 | ieee80211_do_assoc(sdata)) { |
3062 | u8 bssid[ETH_ALEN]; | |
3063 | ||
3064 | memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN); | |
3065 | ||
3066 | ieee80211_destroy_assoc_data(sdata, false); | |
3067 | ||
3068 | mutex_unlock(&ifmgd->mtx); | |
3069 | cfg80211_send_assoc_timeout(sdata->dev, bssid); | |
3070 | mutex_lock(&ifmgd->mtx); | |
3071 | } | |
89afe614 | 3072 | } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) |
66e67e41 JB |
3073 | run_again(ifmgd, ifmgd->assoc_data->timeout); |
3074 | ||
b291ba11 JB |
3075 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
3076 | IEEE80211_STA_CONNECTION_POLL) && | |
3077 | ifmgd->associated) { | |
a43abf29 | 3078 | u8 bssid[ETH_ALEN]; |
72a8a3ed | 3079 | int max_tries; |
a43abf29 | 3080 | |
0c1ad2ca | 3081 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
4e5ff376 | 3082 | |
72a8a3ed | 3083 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
180205bd | 3084 | max_tries = max_nullfunc_tries; |
72a8a3ed | 3085 | else |
180205bd | 3086 | max_tries = max_probe_tries; |
72a8a3ed | 3087 | |
4e5ff376 FF |
3088 | /* ACK received for nullfunc probing frame */ |
3089 | if (!ifmgd->probe_send_count) | |
3090 | ieee80211_reset_ap_probe(sdata); | |
04ac3c0e FF |
3091 | else if (ifmgd->nullfunc_failed) { |
3092 | if (ifmgd->probe_send_count < max_tries) { | |
bdcbd8e0 JB |
3093 | mlme_dbg(sdata, |
3094 | "No ack for nullfunc frame to AP %pM, try %d/%i\n", | |
3095 | bssid, ifmgd->probe_send_count, | |
3096 | max_tries); | |
04ac3c0e FF |
3097 | ieee80211_mgd_probe_ap_send(sdata); |
3098 | } else { | |
bdcbd8e0 JB |
3099 | mlme_dbg(sdata, |
3100 | "No ack for nullfunc frame to AP %pM, disconnecting.\n", | |
3101 | bssid); | |
95acac61 | 3102 | ieee80211_sta_connection_lost(sdata, bssid, |
6b684db1 JB |
3103 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
3104 | false); | |
04ac3c0e FF |
3105 | } |
3106 | } else if (time_is_after_jiffies(ifmgd->probe_timeout)) | |
b291ba11 | 3107 | run_again(ifmgd, ifmgd->probe_timeout); |
04ac3c0e | 3108 | else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
bdcbd8e0 JB |
3109 | mlme_dbg(sdata, |
3110 | "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", | |
3111 | bssid, probe_wait_ms); | |
95acac61 | 3112 | ieee80211_sta_connection_lost(sdata, bssid, |
6b684db1 | 3113 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); |
04ac3c0e | 3114 | } else if (ifmgd->probe_send_count < max_tries) { |
bdcbd8e0 JB |
3115 | mlme_dbg(sdata, |
3116 | "No probe response from AP %pM after %dms, try %d/%i\n", | |
3117 | bssid, probe_wait_ms, | |
3118 | ifmgd->probe_send_count, max_tries); | |
a43abf29 ML |
3119 | ieee80211_mgd_probe_ap_send(sdata); |
3120 | } else { | |
b291ba11 JB |
3121 | /* |
3122 | * We actually lost the connection ... or did we? | |
3123 | * Let's make sure! | |
3124 | */ | |
b38afa87 BG |
3125 | wiphy_debug(local->hw.wiphy, |
3126 | "%s: No probe response from AP %pM" | |
3127 | " after %dms, disconnecting.\n", | |
3128 | sdata->name, | |
180205bd | 3129 | bssid, probe_wait_ms); |
04ac3c0e | 3130 | |
95acac61 | 3131 | ieee80211_sta_connection_lost(sdata, bssid, |
6b684db1 | 3132 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); |
b291ba11 JB |
3133 | } |
3134 | } | |
3135 | ||
77fdaa12 | 3136 | mutex_unlock(&ifmgd->mtx); |
f0706e82 JB |
3137 | } |
3138 | ||
b291ba11 JB |
3139 | static void ieee80211_sta_bcn_mon_timer(unsigned long data) |
3140 | { | |
3141 | struct ieee80211_sub_if_data *sdata = | |
3142 | (struct ieee80211_sub_if_data *) data; | |
3143 | struct ieee80211_local *local = sdata->local; | |
3144 | ||
3145 | if (local->quiescing) | |
3146 | return; | |
3147 | ||
682bd38b | 3148 | sdata->u.mgd.connection_loss = false; |
1e4dcd01 JO |
3149 | ieee80211_queue_work(&sdata->local->hw, |
3150 | &sdata->u.mgd.beacon_connection_loss_work); | |
b291ba11 JB |
3151 | } |
3152 | ||
3153 | static void ieee80211_sta_conn_mon_timer(unsigned long data) | |
3154 | { | |
3155 | struct ieee80211_sub_if_data *sdata = | |
3156 | (struct ieee80211_sub_if_data *) data; | |
3157 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3158 | struct ieee80211_local *local = sdata->local; | |
3159 | ||
3160 | if (local->quiescing) | |
3161 | return; | |
3162 | ||
42935eca | 3163 | ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); |
b291ba11 JB |
3164 | } |
3165 | ||
3166 | static void ieee80211_sta_monitor_work(struct work_struct *work) | |
3167 | { | |
3168 | struct ieee80211_sub_if_data *sdata = | |
3169 | container_of(work, struct ieee80211_sub_if_data, | |
3170 | u.mgd.monitor_work); | |
3171 | ||
3172 | ieee80211_mgd_probe_ap(sdata, false); | |
3173 | } | |
3174 | ||
9c6bd790 JB |
3175 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
3176 | { | |
494f1fe5 EP |
3177 | u32 flags; |
3178 | ||
ad935687 | 3179 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
925e64c3 | 3180 | __ieee80211_stop_poll(sdata); |
ad935687 | 3181 | |
b291ba11 | 3182 | /* let's probe the connection once */ |
494f1fe5 EP |
3183 | flags = sdata->local->hw.flags; |
3184 | if (!(flags & IEEE80211_HW_CONNECTION_MONITOR)) | |
3185 | ieee80211_queue_work(&sdata->local->hw, | |
3186 | &sdata->u.mgd.monitor_work); | |
b291ba11 | 3187 | /* and do all the other regular work too */ |
64592c8f | 3188 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
ad935687 | 3189 | } |
9c6bd790 | 3190 | } |
f0706e82 | 3191 | |
5bb644a0 JB |
3192 | #ifdef CONFIG_PM |
3193 | void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) | |
3194 | { | |
3195 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3196 | ||
3197 | /* | |
3198 | * we need to use atomic bitops for the running bits | |
3199 | * only because both timers might fire at the same | |
3200 | * time -- the code here is properly synchronised. | |
3201 | */ | |
3202 | ||
d1f5b7a3 JB |
3203 | cancel_work_sync(&ifmgd->request_smps_work); |
3204 | ||
0ecfe806 | 3205 | cancel_work_sync(&ifmgd->monitor_work); |
1e4dcd01 | 3206 | cancel_work_sync(&ifmgd->beacon_connection_loss_work); |
882a7c69 | 3207 | cancel_work_sync(&ifmgd->csa_connection_drop_work); |
5bb644a0 JB |
3208 | if (del_timer_sync(&ifmgd->timer)) |
3209 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
3210 | ||
3211 | cancel_work_sync(&ifmgd->chswitch_work); | |
3212 | if (del_timer_sync(&ifmgd->chswitch_timer)) | |
3213 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
b291ba11 | 3214 | |
b291ba11 JB |
3215 | /* these will just be re-established on connection */ |
3216 | del_timer_sync(&ifmgd->conn_mon_timer); | |
3217 | del_timer_sync(&ifmgd->bcn_mon_timer); | |
5bb644a0 JB |
3218 | } |
3219 | ||
3220 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) | |
3221 | { | |
3222 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3223 | ||
782d2673 JB |
3224 | mutex_lock(&ifmgd->mtx); |
3225 | if (!ifmgd->associated) { | |
3226 | mutex_unlock(&ifmgd->mtx); | |
676b58c2 | 3227 | return; |
782d2673 | 3228 | } |
676b58c2 | 3229 | |
95acac61 JB |
3230 | if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { |
3231 | sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; | |
782d2673 JB |
3232 | mlme_dbg(sdata, "driver requested disconnect after resume\n"); |
3233 | ieee80211_sta_connection_lost(sdata, | |
3234 | ifmgd->associated->bssid, | |
6b684db1 JB |
3235 | WLAN_REASON_UNSPECIFIED, |
3236 | true); | |
95acac61 | 3237 | mutex_unlock(&ifmgd->mtx); |
782d2673 | 3238 | return; |
95acac61 | 3239 | } |
782d2673 | 3240 | mutex_unlock(&ifmgd->mtx); |
95acac61 | 3241 | |
5bb644a0 JB |
3242 | if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running)) |
3243 | add_timer(&ifmgd->timer); | |
3244 | if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) | |
3245 | add_timer(&ifmgd->chswitch_timer); | |
c8a7972c | 3246 | ieee80211_sta_reset_beacon_monitor(sdata); |
925e64c3 SG |
3247 | |
3248 | mutex_lock(&sdata->local->mtx); | |
46090979 | 3249 | ieee80211_restart_sta_timer(sdata); |
925e64c3 | 3250 | mutex_unlock(&sdata->local->mtx); |
5bb644a0 JB |
3251 | } |
3252 | #endif | |
3253 | ||
9c6bd790 JB |
3254 | /* interface setup */ |
3255 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 3256 | { |
46900298 | 3257 | struct ieee80211_if_managed *ifmgd; |
988c0f72 | 3258 | |
46900298 | 3259 | ifmgd = &sdata->u.mgd; |
b291ba11 | 3260 | INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
46900298 | 3261 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
1e4dcd01 JO |
3262 | INIT_WORK(&ifmgd->beacon_connection_loss_work, |
3263 | ieee80211_beacon_connection_loss_work); | |
882a7c69 JB |
3264 | INIT_WORK(&ifmgd->csa_connection_drop_work, |
3265 | ieee80211_csa_connection_drop_work); | |
d1f5b7a3 | 3266 | INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work); |
46900298 | 3267 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 3268 | (unsigned long) sdata); |
b291ba11 JB |
3269 | setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, |
3270 | (unsigned long) sdata); | |
3271 | setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, | |
3272 | (unsigned long) sdata); | |
46900298 | 3273 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 3274 | (unsigned long) sdata); |
9c6bd790 | 3275 | |
ab1faead | 3276 | ifmgd->flags = 0; |
1478acb3 | 3277 | ifmgd->powersave = sdata->wdev.ps; |
dc41e4d4 EP |
3278 | ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; |
3279 | ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; | |
bbbdff9e | 3280 | |
77fdaa12 | 3281 | mutex_init(&ifmgd->mtx); |
0f78231b JB |
3282 | |
3283 | if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) | |
3284 | ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; | |
3285 | else | |
3286 | ifmgd->req_smps = IEEE80211_SMPS_OFF; | |
f0706e82 JB |
3287 | } |
3288 | ||
77fdaa12 JB |
3289 | /* scan finished notification */ |
3290 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
60f8b39c | 3291 | { |
31ee67a1 | 3292 | struct ieee80211_sub_if_data *sdata; |
60f8b39c | 3293 | |
77fdaa12 JB |
3294 | /* Restart STA timers */ |
3295 | rcu_read_lock(); | |
3296 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
3297 | ieee80211_restart_sta_timer(sdata); | |
3298 | rcu_read_unlock(); | |
3299 | } | |
60f8b39c | 3300 | |
77fdaa12 JB |
3301 | int ieee80211_max_network_latency(struct notifier_block *nb, |
3302 | unsigned long data, void *dummy) | |
3303 | { | |
3304 | s32 latency_usec = (s32) data; | |
3305 | struct ieee80211_local *local = | |
3306 | container_of(nb, struct ieee80211_local, | |
3307 | network_latency_notifier); | |
1fa6f4af | 3308 | |
77fdaa12 JB |
3309 | mutex_lock(&local->iflist_mtx); |
3310 | ieee80211_recalc_ps(local, latency_usec); | |
3311 | mutex_unlock(&local->iflist_mtx); | |
dfe67012 | 3312 | |
77fdaa12 | 3313 | return 0; |
9c6bd790 JB |
3314 | } |
3315 | ||
f2d9d270 JB |
3316 | static u32 chandef_downgrade(struct cfg80211_chan_def *c) |
3317 | { | |
3318 | u32 ret; | |
3319 | int tmp; | |
3320 | ||
3321 | switch (c->width) { | |
3322 | case NL80211_CHAN_WIDTH_20: | |
3323 | c->width = NL80211_CHAN_WIDTH_20_NOHT; | |
3324 | ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; | |
3325 | break; | |
3326 | case NL80211_CHAN_WIDTH_40: | |
3327 | c->width = NL80211_CHAN_WIDTH_20; | |
3328 | c->center_freq1 = c->chan->center_freq; | |
3329 | ret = IEEE80211_STA_DISABLE_40MHZ | | |
3330 | IEEE80211_STA_DISABLE_VHT; | |
3331 | break; | |
3332 | case NL80211_CHAN_WIDTH_80: | |
3333 | tmp = (30 + c->chan->center_freq - c->center_freq1)/20; | |
3334 | /* n_P40 */ | |
3335 | tmp /= 2; | |
3336 | /* freq_P40 */ | |
3337 | c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; | |
3338 | c->width = NL80211_CHAN_WIDTH_40; | |
3339 | ret = IEEE80211_STA_DISABLE_VHT; | |
3340 | break; | |
3341 | case NL80211_CHAN_WIDTH_80P80: | |
3342 | c->center_freq2 = 0; | |
3343 | c->width = NL80211_CHAN_WIDTH_80; | |
3344 | ret = IEEE80211_STA_DISABLE_80P80MHZ | | |
3345 | IEEE80211_STA_DISABLE_160MHZ; | |
3346 | break; | |
3347 | case NL80211_CHAN_WIDTH_160: | |
3348 | /* n_P20 */ | |
3349 | tmp = (70 + c->chan->center_freq - c->center_freq1)/20; | |
3350 | /* n_P80 */ | |
3351 | tmp /= 4; | |
3352 | c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; | |
3353 | c->width = NL80211_CHAN_WIDTH_80; | |
3354 | ret = IEEE80211_STA_DISABLE_80P80MHZ | | |
3355 | IEEE80211_STA_DISABLE_160MHZ; | |
3356 | break; | |
3357 | default: | |
3358 | case NL80211_CHAN_WIDTH_20_NOHT: | |
3359 | WARN_ON_ONCE(1); | |
3360 | c->width = NL80211_CHAN_WIDTH_20_NOHT; | |
3361 | ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; | |
3362 | break; | |
3363 | } | |
3364 | ||
3365 | WARN_ON_ONCE(!cfg80211_chandef_valid(c)); | |
3366 | ||
3367 | return ret; | |
3368 | } | |
3369 | ||
3370 | static u32 | |
3371 | ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, | |
3372 | struct ieee80211_supported_band *sband, | |
3373 | struct ieee80211_channel *channel, | |
3374 | const struct ieee80211_ht_operation *ht_oper, | |
3375 | const struct ieee80211_vht_operation *vht_oper, | |
3376 | struct cfg80211_chan_def *chandef) | |
3377 | { | |
3378 | struct cfg80211_chan_def vht_chandef; | |
3379 | u32 ht_cfreq, ret; | |
3380 | ||
3381 | chandef->chan = channel; | |
3382 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
3383 | chandef->center_freq1 = channel->center_freq; | |
3384 | chandef->center_freq2 = 0; | |
3385 | ||
3386 | if (!ht_oper || !sband->ht_cap.ht_supported) { | |
3387 | ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; | |
3388 | goto out; | |
3389 | } | |
3390 | ||
3391 | chandef->width = NL80211_CHAN_WIDTH_20; | |
3392 | ||
3393 | ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, | |
3394 | channel->band); | |
3395 | /* check that channel matches the right operating channel */ | |
3396 | if (channel->center_freq != ht_cfreq) { | |
3397 | /* | |
3398 | * It's possible that some APs are confused here; | |
3399 | * Netgear WNDR3700 sometimes reports 4 higher than | |
3400 | * the actual channel in association responses, but | |
3401 | * since we look at probe response/beacon data here | |
3402 | * it should be OK. | |
3403 | */ | |
3404 | sdata_info(sdata, | |
3405 | "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", | |
3406 | channel->center_freq, ht_cfreq, | |
3407 | ht_oper->primary_chan, channel->band); | |
3408 | ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; | |
3409 | goto out; | |
3410 | } | |
3411 | ||
3412 | /* check 40 MHz support, if we have it */ | |
3413 | if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { | |
3414 | switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
3415 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
3416 | chandef->width = NL80211_CHAN_WIDTH_40; | |
3417 | chandef->center_freq1 += 10; | |
3418 | break; | |
3419 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
3420 | chandef->width = NL80211_CHAN_WIDTH_40; | |
3421 | chandef->center_freq1 -= 10; | |
3422 | break; | |
3423 | } | |
3424 | } else { | |
3425 | /* 40 MHz (and 80 MHz) must be supported for VHT */ | |
3426 | ret = IEEE80211_STA_DISABLE_VHT; | |
3427 | goto out; | |
3428 | } | |
3429 | ||
3430 | if (!vht_oper || !sband->vht_cap.vht_supported) { | |
3431 | ret = IEEE80211_STA_DISABLE_VHT; | |
3432 | goto out; | |
3433 | } | |
3434 | ||
3435 | vht_chandef.chan = channel; | |
3436 | vht_chandef.center_freq1 = | |
3437 | ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx, | |
3438 | channel->band); | |
3439 | vht_chandef.center_freq2 = 0; | |
3440 | ||
3441 | if (vht_oper->center_freq_seg2_idx) | |
3442 | vht_chandef.center_freq2 = | |
3443 | ieee80211_channel_to_frequency( | |
3444 | vht_oper->center_freq_seg2_idx, | |
3445 | channel->band); | |
3446 | ||
3447 | switch (vht_oper->chan_width) { | |
3448 | case IEEE80211_VHT_CHANWIDTH_USE_HT: | |
3449 | vht_chandef.width = chandef->width; | |
3450 | break; | |
3451 | case IEEE80211_VHT_CHANWIDTH_80MHZ: | |
3452 | vht_chandef.width = NL80211_CHAN_WIDTH_80; | |
3453 | break; | |
3454 | case IEEE80211_VHT_CHANWIDTH_160MHZ: | |
3455 | vht_chandef.width = NL80211_CHAN_WIDTH_160; | |
3456 | break; | |
3457 | case IEEE80211_VHT_CHANWIDTH_80P80MHZ: | |
3458 | vht_chandef.width = NL80211_CHAN_WIDTH_80P80; | |
3459 | break; | |
3460 | default: | |
3461 | sdata_info(sdata, | |
3462 | "AP VHT operation IE has invalid channel width (%d), disable VHT\n", | |
3463 | vht_oper->chan_width); | |
3464 | ret = IEEE80211_STA_DISABLE_VHT; | |
3465 | goto out; | |
3466 | } | |
3467 | ||
3468 | if (!cfg80211_chandef_valid(&vht_chandef)) { | |
3469 | sdata_info(sdata, | |
3470 | "AP VHT information is invalid, disable VHT\n"); | |
3471 | ret = IEEE80211_STA_DISABLE_VHT; | |
3472 | goto out; | |
3473 | } | |
3474 | ||
3475 | if (cfg80211_chandef_identical(chandef, &vht_chandef)) { | |
3476 | ret = 0; | |
3477 | goto out; | |
3478 | } | |
3479 | ||
3480 | if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { | |
3481 | sdata_info(sdata, | |
3482 | "AP VHT information doesn't match HT, disable VHT\n"); | |
3483 | ret = IEEE80211_STA_DISABLE_VHT; | |
3484 | goto out; | |
3485 | } | |
3486 | ||
3487 | *chandef = vht_chandef; | |
3488 | ||
3489 | ret = 0; | |
3490 | ||
3d9646d0 | 3491 | out: |
f2d9d270 JB |
3492 | while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, |
3493 | IEEE80211_CHAN_DISABLED)) { | |
3494 | if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { | |
3495 | ret = IEEE80211_STA_DISABLE_HT | | |
3496 | IEEE80211_STA_DISABLE_VHT; | |
3497 | goto out; | |
3498 | } | |
3499 | ||
3d9646d0 | 3500 | ret |= chandef_downgrade(chandef); |
f2d9d270 JB |
3501 | } |
3502 | ||
3503 | if (chandef->width != vht_chandef.width) | |
3504 | sdata_info(sdata, | |
3d9646d0 | 3505 | "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); |
f2d9d270 | 3506 | |
f2d9d270 JB |
3507 | WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); |
3508 | return ret; | |
3509 | } | |
3510 | ||
3511 | static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, | |
3512 | struct cfg80211_bss *cbss) | |
3513 | { | |
3514 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3515 | const u8 *ht_cap_ie, *vht_cap_ie; | |
3516 | const struct ieee80211_ht_cap *ht_cap; | |
3517 | const struct ieee80211_vht_cap *vht_cap; | |
3518 | u8 chains = 1; | |
3519 | ||
3520 | if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) | |
3521 | return chains; | |
3522 | ||
9caf0364 | 3523 | ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); |
f2d9d270 JB |
3524 | if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { |
3525 | ht_cap = (void *)(ht_cap_ie + 2); | |
3526 | chains = ieee80211_mcs_to_chains(&ht_cap->mcs); | |
3527 | /* | |
3528 | * TODO: use "Tx Maximum Number Spatial Streams Supported" and | |
3529 | * "Tx Unequal Modulation Supported" fields. | |
3530 | */ | |
3531 | } | |
3532 | ||
3533 | if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) | |
3534 | return chains; | |
3535 | ||
9caf0364 | 3536 | vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); |
f2d9d270 JB |
3537 | if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { |
3538 | u8 nss; | |
3539 | u16 tx_mcs_map; | |
3540 | ||
3541 | vht_cap = (void *)(vht_cap_ie + 2); | |
3542 | tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); | |
3543 | for (nss = 8; nss > 0; nss--) { | |
3544 | if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != | |
3545 | IEEE80211_VHT_MCS_NOT_SUPPORTED) | |
3546 | break; | |
3547 | } | |
3548 | /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ | |
3549 | chains = max(chains, nss); | |
3550 | } | |
3551 | ||
3552 | return chains; | |
3553 | } | |
3554 | ||
b17166a7 JB |
3555 | static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, |
3556 | struct cfg80211_bss *cbss) | |
a1cf775d JB |
3557 | { |
3558 | struct ieee80211_local *local = sdata->local; | |
3559 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
24398e39 | 3560 | const struct ieee80211_ht_operation *ht_oper = NULL; |
f2d9d270 | 3561 | const struct ieee80211_vht_operation *vht_oper = NULL; |
24398e39 | 3562 | struct ieee80211_supported_band *sband; |
4bf88530 | 3563 | struct cfg80211_chan_def chandef; |
f2d9d270 | 3564 | int ret; |
a1cf775d | 3565 | |
24398e39 JB |
3566 | sband = local->hw.wiphy->bands[cbss->channel->band]; |
3567 | ||
f2d9d270 JB |
3568 | ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | |
3569 | IEEE80211_STA_DISABLE_80P80MHZ | | |
3570 | IEEE80211_STA_DISABLE_160MHZ); | |
3571 | ||
9caf0364 JB |
3572 | rcu_read_lock(); |
3573 | ||
f2d9d270 JB |
3574 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && |
3575 | sband->ht_cap.ht_supported) { | |
3576 | const u8 *ht_oper_ie; | |
24398e39 | 3577 | |
9caf0364 | 3578 | ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); |
24398e39 JB |
3579 | if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) |
3580 | ht_oper = (void *)(ht_oper_ie + 2); | |
3581 | } | |
3582 | ||
f2d9d270 JB |
3583 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && |
3584 | sband->vht_cap.vht_supported) { | |
3585 | const u8 *vht_oper_ie; | |
3586 | ||
9caf0364 JB |
3587 | vht_oper_ie = ieee80211_bss_get_ie(cbss, |
3588 | WLAN_EID_VHT_OPERATION); | |
f2d9d270 JB |
3589 | if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) |
3590 | vht_oper = (void *)(vht_oper_ie + 2); | |
3591 | if (vht_oper && !ht_oper) { | |
3592 | vht_oper = NULL; | |
bdcbd8e0 | 3593 | sdata_info(sdata, |
f2d9d270 JB |
3594 | "AP advertised VHT without HT, disabling both\n"); |
3595 | sdata->flags |= IEEE80211_STA_DISABLE_HT; | |
3596 | sdata->flags |= IEEE80211_STA_DISABLE_VHT; | |
24398e39 JB |
3597 | } |
3598 | } | |
3599 | ||
f2d9d270 JB |
3600 | ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, |
3601 | cbss->channel, | |
3602 | ht_oper, vht_oper, | |
3603 | &chandef); | |
04ecd257 | 3604 | |
f2d9d270 JB |
3605 | sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), |
3606 | local->rx_chains); | |
24398e39 | 3607 | |
9caf0364 JB |
3608 | rcu_read_unlock(); |
3609 | ||
04ecd257 JB |
3610 | /* will change later if needed */ |
3611 | sdata->smps_mode = IEEE80211_SMPS_OFF; | |
3612 | ||
f2d9d270 JB |
3613 | /* |
3614 | * If this fails (possibly due to channel context sharing | |
3615 | * on incompatible channels, e.g. 80+80 and 160 sharing the | |
3616 | * same control channel) try to use a smaller bandwidth. | |
3617 | */ | |
3618 | ret = ieee80211_vif_use_channel(sdata, &chandef, | |
3619 | IEEE80211_CHANCTX_SHARED); | |
d601cd8d | 3620 | while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { |
f2d9d270 | 3621 | ifmgd->flags |= chandef_downgrade(&chandef); |
d601cd8d JB |
3622 | ret = ieee80211_vif_use_channel(sdata, &chandef, |
3623 | IEEE80211_CHANCTX_SHARED); | |
3624 | } | |
f2d9d270 | 3625 | return ret; |
b17166a7 JB |
3626 | } |
3627 | ||
3628 | static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, | |
3629 | struct cfg80211_bss *cbss, bool assoc) | |
3630 | { | |
3631 | struct ieee80211_local *local = sdata->local; | |
3632 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3633 | struct ieee80211_bss *bss = (void *)cbss->priv; | |
3634 | struct sta_info *new_sta = NULL; | |
3635 | bool have_sta = false; | |
3636 | int err; | |
3637 | ||
3638 | if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) | |
3639 | return -EINVAL; | |
3640 | ||
3641 | if (assoc) { | |
3642 | rcu_read_lock(); | |
3643 | have_sta = sta_info_get(sdata, cbss->bssid); | |
3644 | rcu_read_unlock(); | |
3645 | } | |
3646 | ||
3647 | if (!have_sta) { | |
3648 | new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); | |
3649 | if (!new_sta) | |
3650 | return -ENOMEM; | |
3651 | } | |
3652 | ||
13e0c8e3 | 3653 | if (new_sta) { |
5d6a1b06 JB |
3654 | u32 rates = 0, basic_rates = 0; |
3655 | bool have_higher_than_11mbit; | |
3656 | int min_rate = INT_MAX, min_rate_index = -1; | |
b17166a7 | 3657 | struct ieee80211_supported_band *sband; |
8cef2c9d | 3658 | const struct cfg80211_bss_ies *ies; |
b17166a7 JB |
3659 | |
3660 | sband = local->hw.wiphy->bands[cbss->channel->band]; | |
3661 | ||
3662 | err = ieee80211_prep_channel(sdata, cbss); | |
3663 | if (err) { | |
3664 | sta_info_free(local, new_sta); | |
3665 | return err; | |
3666 | } | |
5d6a1b06 | 3667 | |
5d6a1b06 JB |
3668 | ieee80211_get_rates(sband, bss->supp_rates, |
3669 | bss->supp_rates_len, | |
3670 | &rates, &basic_rates, | |
3671 | &have_higher_than_11mbit, | |
3672 | &min_rate, &min_rate_index); | |
3673 | ||
3674 | /* | |
3675 | * This used to be a workaround for basic rates missing | |
3676 | * in the association response frame. Now that we no | |
3677 | * longer use the basic rates from there, it probably | |
3678 | * doesn't happen any more, but keep the workaround so | |
3679 | * in case some *other* APs are buggy in different ways | |
3680 | * we can connect -- with a warning. | |
3681 | */ | |
3682 | if (!basic_rates && min_rate_index >= 0) { | |
bdcbd8e0 JB |
3683 | sdata_info(sdata, |
3684 | "No basic rates, using min rate instead\n"); | |
5d6a1b06 JB |
3685 | basic_rates = BIT(min_rate_index); |
3686 | } | |
3687 | ||
13e0c8e3 | 3688 | new_sta->sta.supp_rates[cbss->channel->band] = rates; |
5d6a1b06 JB |
3689 | sdata->vif.bss_conf.basic_rates = basic_rates; |
3690 | ||
3691 | /* cf. IEEE 802.11 9.2.12 */ | |
55de908a | 3692 | if (cbss->channel->band == IEEE80211_BAND_2GHZ && |
5d6a1b06 JB |
3693 | have_higher_than_11mbit) |
3694 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
3695 | else | |
3696 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
3697 | ||
3698 | memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); | |
3699 | ||
8c358bcd JB |
3700 | /* set timing information */ |
3701 | sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; | |
8cef2c9d | 3702 | rcu_read_lock(); |
ef429dad JB |
3703 | ies = rcu_dereference(cbss->beacon_ies); |
3704 | if (ies) { | |
3705 | const u8 *tim_ie; | |
3706 | ||
3707 | sdata->vif.bss_conf.sync_tsf = ies->tsf; | |
3708 | sdata->vif.bss_conf.sync_device_ts = | |
3709 | bss->device_ts_beacon; | |
3710 | tim_ie = cfg80211_find_ie(WLAN_EID_TIM, | |
3711 | ies->data, ies->len); | |
3712 | if (tim_ie && tim_ie[1] >= 2) | |
3713 | sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; | |
3714 | else | |
3715 | sdata->vif.bss_conf.sync_dtim_count = 0; | |
3716 | } else if (!(local->hw.flags & | |
3717 | IEEE80211_HW_TIMING_BEACON_ONLY)) { | |
3718 | ies = rcu_dereference(cbss->proberesp_ies); | |
3719 | /* must be non-NULL since beacon IEs were NULL */ | |
3720 | sdata->vif.bss_conf.sync_tsf = ies->tsf; | |
3721 | sdata->vif.bss_conf.sync_device_ts = | |
3722 | bss->device_ts_presp; | |
3723 | sdata->vif.bss_conf.sync_dtim_count = 0; | |
3724 | } else { | |
3725 | sdata->vif.bss_conf.sync_tsf = 0; | |
3726 | sdata->vif.bss_conf.sync_device_ts = 0; | |
3727 | sdata->vif.bss_conf.sync_dtim_count = 0; | |
3728 | } | |
8cef2c9d | 3729 | rcu_read_unlock(); |
8c358bcd JB |
3730 | |
3731 | /* tell driver about BSSID, basic rates and timing */ | |
5d6a1b06 | 3732 | ieee80211_bss_info_change_notify(sdata, |
8c358bcd JB |
3733 | BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | |
3734 | BSS_CHANGED_BEACON_INT); | |
a1cf775d JB |
3735 | |
3736 | if (assoc) | |
13e0c8e3 | 3737 | sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); |
a1cf775d | 3738 | |
13e0c8e3 JB |
3739 | err = sta_info_insert(new_sta); |
3740 | new_sta = NULL; | |
a1cf775d | 3741 | if (err) { |
bdcbd8e0 JB |
3742 | sdata_info(sdata, |
3743 | "failed to insert STA entry for the AP (error %d)\n", | |
3744 | err); | |
a1cf775d JB |
3745 | return err; |
3746 | } | |
3747 | } else | |
b203ca39 | 3748 | WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); |
a1cf775d JB |
3749 | |
3750 | return 0; | |
3751 | } | |
3752 | ||
77fdaa12 JB |
3753 | /* config hooks */ |
3754 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, | |
3755 | struct cfg80211_auth_request *req) | |
9c6bd790 | 3756 | { |
66e67e41 JB |
3757 | struct ieee80211_local *local = sdata->local; |
3758 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3759 | struct ieee80211_mgd_auth_data *auth_data; | |
77fdaa12 | 3760 | u16 auth_alg; |
66e67e41 JB |
3761 | int err; |
3762 | ||
3763 | /* prepare auth data structure */ | |
9c6bd790 | 3764 | |
77fdaa12 JB |
3765 | switch (req->auth_type) { |
3766 | case NL80211_AUTHTYPE_OPEN_SYSTEM: | |
3767 | auth_alg = WLAN_AUTH_OPEN; | |
3768 | break; | |
3769 | case NL80211_AUTHTYPE_SHARED_KEY: | |
66e67e41 | 3770 | if (IS_ERR(local->wep_tx_tfm)) |
9dca9c49 | 3771 | return -EOPNOTSUPP; |
77fdaa12 JB |
3772 | auth_alg = WLAN_AUTH_SHARED_KEY; |
3773 | break; | |
3774 | case NL80211_AUTHTYPE_FT: | |
3775 | auth_alg = WLAN_AUTH_FT; | |
3776 | break; | |
3777 | case NL80211_AUTHTYPE_NETWORK_EAP: | |
3778 | auth_alg = WLAN_AUTH_LEAP; | |
3779 | break; | |
6b8ece3a JM |
3780 | case NL80211_AUTHTYPE_SAE: |
3781 | auth_alg = WLAN_AUTH_SAE; | |
3782 | break; | |
77fdaa12 JB |
3783 | default: |
3784 | return -EOPNOTSUPP; | |
60f8b39c | 3785 | } |
77fdaa12 | 3786 | |
6b8ece3a JM |
3787 | auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len + |
3788 | req->ie_len, GFP_KERNEL); | |
66e67e41 | 3789 | if (!auth_data) |
9c6bd790 | 3790 | return -ENOMEM; |
77fdaa12 | 3791 | |
66e67e41 | 3792 | auth_data->bss = req->bss; |
77fdaa12 | 3793 | |
6b8ece3a JM |
3794 | if (req->sae_data_len >= 4) { |
3795 | __le16 *pos = (__le16 *) req->sae_data; | |
3796 | auth_data->sae_trans = le16_to_cpu(pos[0]); | |
3797 | auth_data->sae_status = le16_to_cpu(pos[1]); | |
3798 | memcpy(auth_data->data, req->sae_data + 4, | |
3799 | req->sae_data_len - 4); | |
3800 | auth_data->data_len += req->sae_data_len - 4; | |
3801 | } | |
3802 | ||
77fdaa12 | 3803 | if (req->ie && req->ie_len) { |
6b8ece3a JM |
3804 | memcpy(&auth_data->data[auth_data->data_len], |
3805 | req->ie, req->ie_len); | |
3806 | auth_data->data_len += req->ie_len; | |
9c6bd790 | 3807 | } |
77fdaa12 | 3808 | |
fffd0934 | 3809 | if (req->key && req->key_len) { |
66e67e41 JB |
3810 | auth_data->key_len = req->key_len; |
3811 | auth_data->key_idx = req->key_idx; | |
3812 | memcpy(auth_data->key, req->key, req->key_len); | |
fffd0934 JB |
3813 | } |
3814 | ||
66e67e41 | 3815 | auth_data->algorithm = auth_alg; |
60f8b39c | 3816 | |
66e67e41 | 3817 | /* try to authenticate/probe */ |
2a33bee2 | 3818 | |
66e67e41 | 3819 | mutex_lock(&ifmgd->mtx); |
2a33bee2 | 3820 | |
66e67e41 JB |
3821 | if ((ifmgd->auth_data && !ifmgd->auth_data->done) || |
3822 | ifmgd->assoc_data) { | |
3823 | err = -EBUSY; | |
3824 | goto err_free; | |
2a33bee2 GE |
3825 | } |
3826 | ||
66e67e41 JB |
3827 | if (ifmgd->auth_data) |
3828 | ieee80211_destroy_auth_data(sdata, false); | |
2a33bee2 | 3829 | |
66e67e41 JB |
3830 | /* prep auth_data so we don't go into idle on disassoc */ |
3831 | ifmgd->auth_data = auth_data; | |
af6b6374 | 3832 | |
66e67e41 | 3833 | if (ifmgd->associated) |
37ad3888 | 3834 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
af6b6374 | 3835 | |
bdcbd8e0 | 3836 | sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); |
e5b900d2 | 3837 | |
a1cf775d JB |
3838 | err = ieee80211_prep_connection(sdata, req->bss, false); |
3839 | if (err) | |
66e67e41 | 3840 | goto err_clear; |
af6b6374 | 3841 | |
66e67e41 JB |
3842 | err = ieee80211_probe_auth(sdata); |
3843 | if (err) { | |
66e67e41 JB |
3844 | sta_info_destroy_addr(sdata, req->bss->bssid); |
3845 | goto err_clear; | |
3846 | } | |
3847 | ||
3848 | /* hold our own reference */ | |
5b112d3d | 3849 | cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); |
66e67e41 JB |
3850 | err = 0; |
3851 | goto out_unlock; | |
3852 | ||
3853 | err_clear: | |
3d2abdfd EP |
3854 | memset(ifmgd->bssid, 0, ETH_ALEN); |
3855 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
66e67e41 JB |
3856 | ifmgd->auth_data = NULL; |
3857 | err_free: | |
3858 | kfree(auth_data); | |
3859 | out_unlock: | |
3860 | mutex_unlock(&ifmgd->mtx); | |
b2abb6e2 | 3861 | |
66e67e41 | 3862 | return err; |
af6b6374 JB |
3863 | } |
3864 | ||
77fdaa12 JB |
3865 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
3866 | struct cfg80211_assoc_request *req) | |
f0706e82 | 3867 | { |
66e67e41 | 3868 | struct ieee80211_local *local = sdata->local; |
77fdaa12 | 3869 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
0c1ad2ca | 3870 | struct ieee80211_bss *bss = (void *)req->bss->priv; |
66e67e41 | 3871 | struct ieee80211_mgd_assoc_data *assoc_data; |
c65dd147 | 3872 | const struct cfg80211_bss_ies *beacon_ies; |
4e74bfdb | 3873 | struct ieee80211_supported_band *sband; |
b08fbbd8 | 3874 | const u8 *ssidie, *ht_ie, *vht_ie; |
2a33bee2 | 3875 | int i, err; |
f0706e82 | 3876 | |
66e67e41 JB |
3877 | assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); |
3878 | if (!assoc_data) | |
3879 | return -ENOMEM; | |
3880 | ||
9caf0364 JB |
3881 | rcu_read_lock(); |
3882 | ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); | |
3883 | if (!ssidie) { | |
3884 | rcu_read_unlock(); | |
3885 | kfree(assoc_data); | |
3886 | return -EINVAL; | |
3887 | } | |
3888 | memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); | |
3889 | assoc_data->ssid_len = ssidie[1]; | |
3890 | rcu_read_unlock(); | |
3891 | ||
77fdaa12 | 3892 | mutex_lock(&ifmgd->mtx); |
9c87ba67 | 3893 | |
66e67e41 | 3894 | if (ifmgd->associated) |
37ad3888 | 3895 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
66e67e41 JB |
3896 | |
3897 | if (ifmgd->auth_data && !ifmgd->auth_data->done) { | |
3898 | err = -EBUSY; | |
3899 | goto err_free; | |
af6b6374 | 3900 | } |
77fdaa12 | 3901 | |
66e67e41 JB |
3902 | if (ifmgd->assoc_data) { |
3903 | err = -EBUSY; | |
3904 | goto err_free; | |
3905 | } | |
77fdaa12 | 3906 | |
66e67e41 JB |
3907 | if (ifmgd->auth_data) { |
3908 | bool match; | |
3909 | ||
3910 | /* keep sta info, bssid if matching */ | |
b203ca39 | 3911 | match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); |
66e67e41 | 3912 | ieee80211_destroy_auth_data(sdata, match); |
2a33bee2 GE |
3913 | } |
3914 | ||
66e67e41 | 3915 | /* prepare assoc data */ |
19c3b830 | 3916 | |
d8ec4433 JO |
3917 | ifmgd->beacon_crc_valid = false; |
3918 | ||
de5036aa JB |
3919 | /* |
3920 | * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. | |
3921 | * We still associate in non-HT mode (11a/b/g) if any one of these | |
3922 | * ciphers is configured as pairwise. | |
3923 | * We can set this to true for non-11n hardware, that'll be checked | |
3924 | * separately along with the peer capabilities. | |
3925 | */ | |
1c4cb928 | 3926 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { |
77fdaa12 JB |
3927 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || |
3928 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || | |
1c4cb928 | 3929 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { |
a8243b72 | 3930 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
d545daba | 3931 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
1c4cb928 | 3932 | netdev_info(sdata->dev, |
d545daba | 3933 | "disabling HT/VHT due to WEP/TKIP use\n"); |
1c4cb928 JB |
3934 | } |
3935 | } | |
77fdaa12 | 3936 | |
d545daba | 3937 | if (req->flags & ASSOC_REQ_DISABLE_HT) { |
a8243b72 | 3938 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
d545daba MP |
3939 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
3940 | } | |
ef96a842 | 3941 | |
4e74bfdb JB |
3942 | /* Also disable HT if we don't support it or the AP doesn't use WMM */ |
3943 | sband = local->hw.wiphy->bands[req->bss->channel->band]; | |
3944 | if (!sband->ht_cap.ht_supported || | |
1c4cb928 | 3945 | local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) { |
a8243b72 | 3946 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
1b49de26 JB |
3947 | if (!bss->wmm_used) |
3948 | netdev_info(sdata->dev, | |
3949 | "disabling HT as WMM/QoS is not supported by the AP\n"); | |
1c4cb928 | 3950 | } |
4e74bfdb | 3951 | |
d545daba MP |
3952 | /* disable VHT if we don't support it or the AP doesn't use WMM */ |
3953 | if (!sband->vht_cap.vht_supported || | |
3954 | local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) { | |
3955 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; | |
1b49de26 JB |
3956 | if (!bss->wmm_used) |
3957 | netdev_info(sdata->dev, | |
3958 | "disabling VHT as WMM/QoS is not supported by the AP\n"); | |
d545daba MP |
3959 | } |
3960 | ||
ef96a842 BG |
3961 | memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); |
3962 | memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, | |
3963 | sizeof(ifmgd->ht_capa_mask)); | |
3964 | ||
77fdaa12 | 3965 | if (req->ie && req->ie_len) { |
66e67e41 JB |
3966 | memcpy(assoc_data->ie, req->ie, req->ie_len); |
3967 | assoc_data->ie_len = req->ie_len; | |
3968 | } | |
f679f65d | 3969 | |
66e67e41 | 3970 | assoc_data->bss = req->bss; |
f679f65d | 3971 | |
af6b6374 JB |
3972 | if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { |
3973 | if (ifmgd->powersave) | |
04ecd257 | 3974 | sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; |
af6b6374 | 3975 | else |
04ecd257 | 3976 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
af6b6374 | 3977 | } else |
04ecd257 | 3978 | sdata->smps_mode = ifmgd->req_smps; |
af6b6374 | 3979 | |
66e67e41 | 3980 | assoc_data->capability = req->bss->capability; |
32c5057b JB |
3981 | assoc_data->wmm = bss->wmm_used && |
3982 | (local->hw.queues >= IEEE80211_NUM_ACS); | |
66e67e41 JB |
3983 | assoc_data->supp_rates = bss->supp_rates; |
3984 | assoc_data->supp_rates_len = bss->supp_rates_len; | |
9dde6423 | 3985 | |
9caf0364 | 3986 | rcu_read_lock(); |
9dde6423 JB |
3987 | ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); |
3988 | if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) | |
3989 | assoc_data->ap_ht_param = | |
3990 | ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; | |
3991 | else | |
a8243b72 | 3992 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
b08fbbd8 JB |
3993 | vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); |
3994 | if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) | |
3995 | memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, | |
3996 | sizeof(struct ieee80211_vht_cap)); | |
3997 | else | |
3998 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; | |
9caf0364 | 3999 | rcu_read_unlock(); |
63f170e0 | 4000 | |
ab13315a KV |
4001 | if (bss->wmm_used && bss->uapsd_supported && |
4002 | (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { | |
76f0303d | 4003 | assoc_data->uapsd = true; |
ab13315a KV |
4004 | ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; |
4005 | } else { | |
76f0303d | 4006 | assoc_data->uapsd = false; |
ab13315a KV |
4007 | ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; |
4008 | } | |
4009 | ||
77fdaa12 | 4010 | if (req->prev_bssid) |
66e67e41 | 4011 | memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); |
77fdaa12 JB |
4012 | |
4013 | if (req->use_mfp) { | |
4014 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; | |
4015 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; | |
4016 | } else { | |
4017 | ifmgd->mfp = IEEE80211_MFP_DISABLED; | |
4018 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; | |
4019 | } | |
4020 | ||
4021 | if (req->crypto.control_port) | |
4022 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; | |
4023 | else | |
4024 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; | |
4025 | ||
a621fa4d JB |
4026 | sdata->control_port_protocol = req->crypto.control_port_ethertype; |
4027 | sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; | |
4028 | ||
66e67e41 JB |
4029 | /* kick off associate process */ |
4030 | ||
4031 | ifmgd->assoc_data = assoc_data; | |
826262c3 | 4032 | ifmgd->dtim_period = 0; |
66e67e41 | 4033 | |
a1cf775d JB |
4034 | err = ieee80211_prep_connection(sdata, req->bss, true); |
4035 | if (err) | |
4036 | goto err_clear; | |
66e67e41 | 4037 | |
c65dd147 EG |
4038 | rcu_read_lock(); |
4039 | beacon_ies = rcu_dereference(req->bss->beacon_ies); | |
826262c3 | 4040 | |
c65dd147 EG |
4041 | if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC && |
4042 | !beacon_ies) { | |
4043 | /* | |
4044 | * Wait up to one beacon interval ... | |
4045 | * should this be more if we miss one? | |
4046 | */ | |
4047 | sdata_info(sdata, "waiting for beacon from %pM\n", | |
4048 | ifmgd->bssid); | |
4049 | assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); | |
89afe614 | 4050 | assoc_data->timeout_started = true; |
c65dd147 EG |
4051 | assoc_data->need_beacon = true; |
4052 | } else if (beacon_ies) { | |
4053 | const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, | |
4054 | beacon_ies->data, | |
4055 | beacon_ies->len); | |
ef429dad JB |
4056 | u8 dtim_count = 0; |
4057 | ||
c65dd147 EG |
4058 | if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { |
4059 | const struct ieee80211_tim_ie *tim; | |
4060 | tim = (void *)(tim_ie + 2); | |
4061 | ifmgd->dtim_period = tim->dtim_period; | |
ef429dad | 4062 | dtim_count = tim->dtim_count; |
826262c3 | 4063 | } |
66e67e41 | 4064 | assoc_data->have_beacon = true; |
66e67e41 | 4065 | assoc_data->timeout = jiffies; |
89afe614 | 4066 | assoc_data->timeout_started = true; |
ef429dad JB |
4067 | |
4068 | if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { | |
4069 | sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; | |
4070 | sdata->vif.bss_conf.sync_device_ts = | |
4071 | bss->device_ts_beacon; | |
4072 | sdata->vif.bss_conf.sync_dtim_count = dtim_count; | |
4073 | } | |
c65dd147 EG |
4074 | } else { |
4075 | assoc_data->timeout = jiffies; | |
89afe614 | 4076 | assoc_data->timeout_started = true; |
66e67e41 | 4077 | } |
c65dd147 EG |
4078 | rcu_read_unlock(); |
4079 | ||
66e67e41 JB |
4080 | run_again(ifmgd, assoc_data->timeout); |
4081 | ||
fcff4f10 PS |
4082 | if (bss->corrupt_data) { |
4083 | char *corrupt_type = "data"; | |
4084 | if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { | |
4085 | if (bss->corrupt_data & | |
4086 | IEEE80211_BSS_CORRUPT_PROBE_RESP) | |
4087 | corrupt_type = "beacon and probe response"; | |
4088 | else | |
4089 | corrupt_type = "beacon"; | |
4090 | } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) | |
4091 | corrupt_type = "probe response"; | |
bdcbd8e0 JB |
4092 | sdata_info(sdata, "associating with AP with corrupt %s\n", |
4093 | corrupt_type); | |
fcff4f10 PS |
4094 | } |
4095 | ||
66e67e41 JB |
4096 | err = 0; |
4097 | goto out; | |
4098 | err_clear: | |
3d2abdfd EP |
4099 | memset(ifmgd->bssid, 0, ETH_ALEN); |
4100 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
66e67e41 JB |
4101 | ifmgd->assoc_data = NULL; |
4102 | err_free: | |
4103 | kfree(assoc_data); | |
4104 | out: | |
4105 | mutex_unlock(&ifmgd->mtx); | |
4106 | ||
4107 | return err; | |
f0706e82 JB |
4108 | } |
4109 | ||
77fdaa12 | 4110 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
63c9c5e7 | 4111 | struct cfg80211_deauth_request *req) |
f0706e82 | 4112 | { |
46900298 | 4113 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
6ae16775 | 4114 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
6863255b | 4115 | bool tx = !req->local_state_change; |
86552017 | 4116 | bool sent_frame = false; |
f0706e82 | 4117 | |
77fdaa12 JB |
4118 | mutex_lock(&ifmgd->mtx); |
4119 | ||
bdcbd8e0 JB |
4120 | sdata_info(sdata, |
4121 | "deauthenticating from %pM by local choice (reason=%d)\n", | |
4122 | req->bssid, req->reason_code); | |
0ff71613 | 4123 | |
86552017 | 4124 | if (ifmgd->auth_data) { |
8c7d857c | 4125 | drv_mgd_prepare_tx(sdata->local, sdata); |
37ad3888 JB |
4126 | ieee80211_send_deauth_disassoc(sdata, req->bssid, |
4127 | IEEE80211_STYPE_DEAUTH, | |
6863255b | 4128 | req->reason_code, tx, |
37ad3888 | 4129 | frame_buf); |
86552017 JB |
4130 | ieee80211_destroy_auth_data(sdata, false); |
4131 | mutex_unlock(&ifmgd->mtx); | |
4132 | ||
4133 | sent_frame = tx; | |
4134 | goto out; | |
8c7d857c EG |
4135 | } |
4136 | ||
86552017 JB |
4137 | if (ifmgd->associated && |
4138 | ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { | |
4139 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, | |
4140 | req->reason_code, tx, frame_buf); | |
4141 | sent_frame = tx; | |
4142 | } | |
37ad3888 JB |
4143 | mutex_unlock(&ifmgd->mtx); |
4144 | ||
86552017 | 4145 | out: |
86552017 JB |
4146 | if (sent_frame) |
4147 | __cfg80211_send_deauth(sdata->dev, frame_buf, | |
4148 | IEEE80211_DEAUTH_FRAME_LEN); | |
4149 | ||
f0706e82 JB |
4150 | return 0; |
4151 | } | |
84363e6e | 4152 | |
77fdaa12 | 4153 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
63c9c5e7 | 4154 | struct cfg80211_disassoc_request *req) |
9c6bd790 | 4155 | { |
77fdaa12 | 4156 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
e69e95db | 4157 | u8 bssid[ETH_ALEN]; |
6ae16775 | 4158 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
9c6bd790 | 4159 | |
77fdaa12 | 4160 | mutex_lock(&ifmgd->mtx); |
10f644a4 | 4161 | |
8d8b261a JB |
4162 | /* |
4163 | * cfg80211 should catch this ... but it's racy since | |
4164 | * we can receive a disassoc frame, process it, hand it | |
4165 | * to cfg80211 while that's in a locked section already | |
4166 | * trying to tell us that the user wants to disconnect. | |
4167 | */ | |
0c1ad2ca | 4168 | if (ifmgd->associated != req->bss) { |
77fdaa12 JB |
4169 | mutex_unlock(&ifmgd->mtx); |
4170 | return -ENOLINK; | |
4171 | } | |
4172 | ||
bdcbd8e0 JB |
4173 | sdata_info(sdata, |
4174 | "disassociating from %pM by local choice (reason=%d)\n", | |
4175 | req->bss->bssid, req->reason_code); | |
0ff71613 | 4176 | |
e69e95db | 4177 | memcpy(bssid, req->bss->bssid, ETH_ALEN); |
37ad3888 JB |
4178 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, |
4179 | req->reason_code, !req->local_state_change, | |
4180 | frame_buf); | |
77fdaa12 | 4181 | mutex_unlock(&ifmgd->mtx); |
10f644a4 | 4182 | |
6ae16775 AQ |
4183 | __cfg80211_send_disassoc(sdata->dev, frame_buf, |
4184 | IEEE80211_DEAUTH_FRAME_LEN); | |
bc83b681 | 4185 | |
10f644a4 JB |
4186 | return 0; |
4187 | } | |
026331c4 | 4188 | |
afa762f6 | 4189 | void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) |
54e4ffb2 JB |
4190 | { |
4191 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
4192 | ||
4193 | mutex_lock(&ifmgd->mtx); | |
4194 | if (ifmgd->assoc_data) | |
4195 | ieee80211_destroy_assoc_data(sdata, false); | |
4196 | if (ifmgd->auth_data) | |
4197 | ieee80211_destroy_auth_data(sdata, false); | |
4198 | del_timer_sync(&ifmgd->timer); | |
4199 | mutex_unlock(&ifmgd->mtx); | |
4200 | } | |
4201 | ||
a97c13c3 JO |
4202 | void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, |
4203 | enum nl80211_cqm_rssi_threshold_event rssi_event, | |
4204 | gfp_t gfp) | |
4205 | { | |
4206 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4207 | ||
b5878a2d JB |
4208 | trace_api_cqm_rssi_notify(sdata, rssi_event); |
4209 | ||
a97c13c3 JO |
4210 | cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); |
4211 | } | |
4212 | EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); |